CONCENTRATED LOW WATER ACTIVITY
LIQUID HUMAN MILK FORTIFIER INCLUDING
EXTENSIVELY HYDROLYZED PROTEIN
CROSS REFERENCE TO RELATED APPLICATIONS
[oooi] The present application hereby claims the benefit of the provisional patent
applications, Serial Nos. 61/581,636; and 61/581,637, filed on December 30, 201 1, the
disclosures of which are incorporated by reference herein in their entirety.
FIELD OF THE DISCLOSURE
[0002] The present disclosure relates to a stable, concentrated liquid human milk
fortifier. More particularly, the present disclosure relates to a long term stable,
concentrated liquid human milk fortifier having a low water activity, and in some
embodiments, a low pH. The concentrated liquid human milk fortifier may additionally
includes extensively hydrolyzed casein, a high solids content, and a probiotic.
BACKGROUND
[0003] Human milk is generally recognized as an ideal feeding for most infants due to its
overall nutritional composition. Human milk provides infants with unique immunologic
and developmental benefits as compared generally to commercially available infant
formulas. For some infants, however, especially preterm infants, human milk does not
always meet the complete nutritional needs. Although these infants still generally benefit
from human milk, it is often desirable to supplement their human milk feedings with
additional nutrients. Initially, these preterm infants may grow more rapidly than many of
their term counterparts, and accelerated growth often requires additional nutrition, which
is made possible by the use of a human milk fortifier in combination with human milk.
[0004] Further, some infants, and especially preterm infants whose digestive tracts are
immature, experience a delayed and abnormal pattern of gut colonization, particularly
with regard to probiotics such as bifidobacteria and lactobacilli. This impaired intestinal
colonization may predispose preterm infants to necrotizing enterocolitis (NEC) and
increase the risk of bacterial translocation.
[0005] Most of the human milk fortifiers described in the literature and commercially
available have been formulated as reconstitutable powders rather than liquids in order to
minimize the volume displacement of human milk by the fortifier. The fortifiers may
additional include probiotics. As probiotics are living organisms, addition of probiotics
to a liquid formula risks inconsistent bacterial levels due to undesired proliferation
followed by die-off over time. Undesired proliferation of probiotic microorganisms will
negatively affect the nutritional profile and physical stability of the final product.
[0006] Recently, however, liquid human milk fortifiers, and specifically highly
concentrated human milk fortifier liquids, have received more attention as an alternative
to powders. Although these highly concentrated liquid human milk fortifiers do generally
displace slightly more volume than the conventional powders, the liquids have the
significant benefit of being commercially sterile as they can be subjected to sufficient
heat treatment during manufacturing, including optional aseptic manufacturing for
sterility.
[0007] Due to sensitive digestive systems and poor tolerance in many preterm infants, it
may be advantageous to utilize hydrolyzed proteins in human milk fortifiers. However, as
compared to intact proteins, extensively hydrolyzed proteins (i.e., proteins having a
degree of hydrolysis of about 20% or more) tend to have poor ability to form long term
stable emulsions. Additionally, the presence of high levels of insoluble minerals such as
calcium salts may also cause a number of stability issues when used in combination with
extensively hydrolyzed proteins. As such, manufacturing long term stable concentrated
liquid human milk fortifiers including extensively hydrolyzed proteins has proven
difficult.
[0008] Many liquid human milk fortifiers have been manufactured with stabilizers, such
as carrageenan. The stabilizers act to hold the nutrients and insolubles in solution over
time and thus improve long term stability of the product. Although stabilizers such as
carrageenan have generally proven to retard precipitation of many ingredients in the
liquid nutritional formulations, this type of stabilizer is not permitted in infant formulas
and human milk fortifiers in many countries around the world. When stabilizers cannot
be used in highly concentrated human milk fortifiers, it can be very difficult to produce a
long term stable highly concentrated human milk fortifier.
[0009] As such, there is a need for highly concentrated low water activity liquid human
milk fortifiers that are sufficiently long term stable that include hypoallergenic proteins,
such as extensively hydrolyzed casein proteins, and optionally probiiotics. Additionally,
it would be very beneficial if the highly concentrated low water activity human milk
fortifier could be formulated to provide additional macro- and micro-nutrients without
unwanted mineral fallout during storage.
BRIEF SUMMARY
[ooio] The present disclosure is directed to long term stable high solids content and low
water activity liquid human milk fortifiers including extensively hydrolyzed casein. In
some embodiments, the extensively hydrolyzed casein is the sole source of protein in the
concentrated liquid human milk fortifier. The concentrated liquid human milk fortifiers
may be, in some embodiments, hypoallergenic. Because the liquid human milk fortifiers
of the present disclosure have a high solids content and low water activity, their volume
displacement when mixed with human breast milk and/or infant formula is minimized
and their sterility is increased.
[ooii] The present disclosure is specifically directed to a concentrated liquid human milk
fortifier comprising from about 5% to about 50% by weight protein, on a dry weight
basis, and optionally a probiotic. At least a portion of the protein is extensively
hydrolyzed casein. The concentrated liquid human milk fortifier has a solids content of
greater than 50% by weight and has a water activity of less than 0.90.
loo The present disclosure is further specifically directed to an aseptically-sterilized
concentrated liquid human milk fortifier comprising from about 5% to about 50% by
weight protein, on a dry weight basis, and optionally a probiotic. At least a portion of the
protein is extensively hydrolyzed casein. The concentrated liquid human milk fortifier
comprises a solids content of greater than 50% by weight, a pH of from 4.6 to 6.5, and a
water activity of less than 0.90.
[0013] The present disclosure is further specifically directed to a method of fortifying
breast milk. The method comprises mixing a liquid human milk fortifier with breast milk
in a volume to volume ratio of 1:10 or less. The liquid human milk fortifier comprises
from about 5% to about 50% by weight protein, on a dry weight basis, and optionally a
probiotic. At least a portion of the protein is extensively hydrolyzed casein. The liquid
human milk fortifier comprises a solids content of greater than 50% by weight and a
water activity of less than 0.90.
[0014] The present disclosure is further specifically directed to a concentrated liquid
nutritional composition comprising from about 5% to about 50% by weight protein, on a
dry weight basis, wherein at least a portion of the protein is extensively hydrolyzed
casein, and optionally a probiotic. The liquid nutritional composition comprises a solids
content of greater than 50% by weight and a water activity of less than 0.90.
[0015] In some embodiments, the concentrated liquid human milk fortifier further
includes a stabilizer system. In one embodiment, the stabilizer system is comprised of an
octenyl succinic anhydride (OSA) modified starch (e.g., OSA modified corn starch) and a
low acyl gellan gum. In another embodiment, the stabilizer system is a single stabilizer
such as OSA modified potato starch. The stabilizer system allows for the use of the
extensively hydrolyzed casein protein without the associated problems of mineral fallout
and poor emulsion stability, and allows for the fortifier, in some embodiments, to be
carrageenan-free.
[0001] It has been unexpectedly found that stable, concentrated liquid human
milk fortifiers and concentrated liquid nutritional compositions can advantageously be
prepared with a low water activity and/or low pH level. The low water activity, for
example, a water activity of less than 0.90, and/or low pH, for example, a pH within the
range of 4.6 to 6.5, of the liquid can reduce or even inhibit bacterial growth in the liquid
such as from Cronobacter sakazakii, preventing subsequent food spoilage. Moreover, the
low water activity and/or low pH provides an environment that hinders the growth of
probiotic bacteria such as Bifidobacterium and Lactobacillus species, while maintaining
its viability. This improves product consistency and may prevent inconsistent bacterial
levels in the gut upon product use due to uncontrolled proliferation of the probiotics
followed by die-off over time.
[0016] A balanced colonization of probiotics, through both supplementing the
concentrated liquids with one or more probiotics and providing the liquids with low water
activity and/or low pH to reduce uncontrolled microbial growth, can be provided so as to
provide infants, and particularly, preterm infants, with a reduced bowel reservoir of
pathogenic microorganisms, a reduced dependence on broad-spectrum antibiotics, an
increased gut mucosal barrier to pathogenic bacteria, and an up-regulation in protective
immunity. This is especially desirable for low birth weight and preterm infants delivered
by caesarean section as these infants may be more at risk for slower development of
diverse and beneficial intestinal flora as compared to a naturally born infant. The
addition of probiotics further provides protection to the preterm infant against necrotizing
enterocolitis and bacterial translocation.
[0017] Furthermore, by lowering one or both of water activity and pH of the concentrated
liquids of the present disclosure, a sterile liquid may be produced having reduced
microbial growth, and thus, greater stability and longer shelf-life without extensive and
severe heat treatment. By reducing the severity of heat treatment required to sterilize the
concentrated liquids, the need to over-fortify ingredients (e.g., vitamins and minerals),
which may be heat sensitive, may be reduced or eliminated. This further can reduce
processing costs.
[0018] Supplementation with probiotics further provides for improved enteral nutrition,
thereby improving weight gain typically desired of low birth weight and preterm infants.
[0019] Additionally, it has been unexpectedly discovered that concentrated liquids can be
prepared to have higher solids contents; that is, solids contents of greater than 50% by
weight, and more preferably, greater than 60% by weight. With a more concentrated
liquid, and thus greater caloric density, the dose size required may also be reduced. This
will allow for increased cost savings and compact packaging size.
[0020] The stable concentrated liquids can further be prepared to include hypoallergenic
extensively hydrolyzed casein proteins, which is beneficial for use in low birth weight
and preterm infants having sensitive digestive systems. These liquids including
extensively hydrolyzed casein proteins can be prepared without disrupting the long term
stability or emulsion properties of the liquid. By preparing a concentrated liquid by
utilizing a stabilizer system including a octenyl succinic anhydride modified corn starch
and low acyl gellan gum (or octenyl succinic anhydride modified potato starch as a sole
stabilizer), the concentrated liquid may include up to 100% extensively hydrolyzed casein
(by weight of the protein component) while maintaining the desired emulsion and
stability properties.
DETAILED DESCRIPTION
[0021] The concentrated liquid compositions, and particularly concentrated liquid
human milk fortifiers, of the present disclosure generally comprise extensively
hydrolyzed casein, have a high solids content, and a low water activity, and optionally a
probiotic. These concentrated liquid human milk fortifiers are long term stable and
displace only a minimal amount of volume upon addition to human breast milk and/or
infant formula.
[0022] The concentrated liquid human milk fortifiers of the present disclosure address
and provide a solution to the longstanding problem of providing a sterile, long term
stable, hypoallergenic liquid human milk fortifier, optionally including a probiotic, that
can be used in combination with human breast milk or infant formula without significant
volume displacement. The concentrated liquid human milk fortifiers of the present
disclosure not only provide the significant benefit of improved sterility as compared to
powdered human milk fortifiers that may potentially be subject to microbial
contamination, but also provide a stable human milk fortifier that includes extensively
hydrolyzed protein that can be more easily digested and absorbed into the gut of an
infant, and particularly a preterm infant, as compared to intact proteins, and optinally
includes a probiotic. The previous problems of providing a liquid human milk fortifier
with probiotic activity have been overcome in the human milk fortifiers disclosed herein.
[0023] By providing a long term stable concentrated liquid human milk fortifier that can
be based partly or solely on an extensively hydrolyzed protein component, optionally in
combination with a probiotic, the present disclosure now provides a sterile, concentrated
liquid product that can be used in neonatal intensive care units in combination with
human breast milk or infant formula for preterm and term infants to provide the infant
with the additional nutrients, including both protein and minerals, required for growth
and maturation. This can now be done with a highly sterile, stable product that is highly
concentrated so as to be more like a powdered human milk fortifier from a volume
displacement perspective.
[0 2 ] These and other elements or limitations of the concentrated liquids and methods
of the present disclosure are described in detail hereinafter.
[0025] The terms "retort packaging" and "retort sterilizing" are used interchangeably
herein, and unless otherwise specified, refer to the common practice of filling a container,
most typically a metal can or other similar package, with a nutritional liquid and then
subjecting the liquid-filled package to the necessary heat sterilization step, to form a
sterilized, retort packaged, nutritional liquid product.
[0026] The term "aseptic packaging" as used herein, unless otherwise specified, refers to
the manufacture of a packaged product without reliance upon the above-described retort
packaging step, wherein the nutritional liquid and package are sterilized separately prior
to filling, and then are combined under sterilized or aseptic processing conditions to form
a sterilized, aseptically packaged, nutritional liquid product.
[0027] The term "infant" as used herein, refers generally to individuals less than about 1
year of age, actual or corrected.
[0028] The term "preterm" are used herein refers to those infants born at less than 37
weeks gestation, having a birth weight of less than 2500 g, or both.
[0029] The terms "fortifier solids" or "total solids", unless otherwise specified, are used
interchangeably herein and refer to all material components of the compositions of the
present disclosure, less water.
[0030] The term "hypoallergenic" as used herein means that the concentrated liquid has
a decreased tendency to provoke an allergic reaction in a user, such as a preterm or term
infant, as compared to non-hypoallergenic liquids.
[0031] The term "extensively hydrolyzed' as used herein refers to protein that has been
enzymatically or acidically hydrolyzed to have a degree of hydrolysis of at least 20%.
Typically, extensively hydrolyzed proteins exist primarily as di- and tripeptides.
[0032] The terms "liquid nutritional composition" and "nutritional liquid" are used
interchangeably herein, and unless otherwise specified, refer to nutritional products in
concentrated form.
[0033] The term "adult nutritional product" as used herein includes formulas for
generally maintaining or improving the health of an adult, and includes those formulas
designed for adults who need to control their blood glucose.
[0034] The terms "stable" and "shelf stable" as used herein means that the concentrated
liquid is resistant to separation of the liquid into two or more discernable layers (e.g., a
top cream layer and a bottom serum layer) and precipitation/sediment formation on the
bottom of a container for a time period after manufacture of at least three months,
desirably at least six months, desirably at least twelve months, and more desirably at least
eighteen months.
[0035] All percentages, parts and ratios as used herein, are by weight of the total
composition, unless otherwise specified. All such weights as they pertain to listed
ingredients are based on the active level and, therefore, do not include solvents or by¬
products that may be included in commercially available materials, unless otherwise
specified.
[0036] Numerical ranges as used herein are intended to include every number and subset
of numbers within that range, whether specifically disclosed or not. Further, these
numerical ranges should be construed as providing support for a claim directed to any
number or subset of numbers in that range. For example, a disclosure of from 1 to 10
should be construed as supporting a range of from 2 to 8, from 3 to 7, from 5 to 6, from 1
to 9, from 3.6 to 4.6, from 3.5 to 9.9, and so forth.
[0037] All references to singular characteristics or limitations of the present disclosure
shall include the corresponding plural characteristic or limitation, and vice versa, unless
otherwise specified or clearly implied to the contrary by the context in which the
reference is made.
[0038] All combinations of method or process steps as used herein can be performed in
any order, unless otherwise specified or clearly implied to the contrary by the context in
which the referenced combination is made.
[0039] The various embodiments of the concentrated liquids of the present disclosure
may also be substantially free of any optional or selected ingredient or feature described
herein, provided that the remaining concentrated liquid still contains all of the required
ingredients or features as described herein. In this context, and unless otherwise
specified, the term "substantially free" means that the selected concentrated liquid
contains less than a functional amount of the optional ingredient, typically less than 0.1%
by weight, and also including zero percent by weight of such optional or selected
ingredient.
[0040] The concentrated liquids and corresponding manufacturing methods of the
present disclosure can comprise, consist of, or consist essentially of the elements and
limitations of the disclosure as described herein, as well as any additional or optional
ingredients, components, or limitations described herein or otherwise useful in the
concentrated liquid.
Product Form
[0041] While discussed primarily as a concentrated liquid human milk fortifier, it should
be recognized by one skilled in the art based on the disclosure herein that the
concentrated compositions described herein may alternatively be used in liquid
nutritional compositions such as for use with suspensions, emulsions or clear or
substantially clear liquids. The resulting concentrated liquid nutritional compositions may
be used as adult liquid nutritional compositions and/or medicinal liquid nutritional
compositions.
[0042] The concentrated liquid human milk fortifiers of the present disclosure have a
solids content of at least 50%, or even at least 60%, including from about 50% to about
65%, and further including from about 58% to about 62%. The concentrated liquid
human milk fortifiers are liquids that are capable of being poured directly from a package
containing them into human milk, formula, or mixtures thereof.
[0043] The concentrated liquid human milk fortifiers are generally formulated to have a
caloric density of at least 1.25 kcal/ml (37 kcal/fl oz), including from about 1.3 kcal/ml
(38 kcal/fl oz) to about 5 kcal/ml (149 kcal/fl oz), and also including from about 1.4
kcal/ml (40 kcal/fl oz) to about 2.7 kcal/ml (80 kcal/fl oz), and also including from about
1.5 kcal/ml (44 kcal/fl oz) to about 2.0 kcal/ml (59 kcal/fl oz).
[0044] The concentrated liquid human milk fortifiers include packaged compositions
further comprising a suitable unit dose package or container. The term "unit dose" as used
herein refers to individual, single-use, packages of concentrated liquid human milk
fortifier containing an amount of human milk fortifier that can be used in a preparation of
an infant feeding to provide sufficient human milk fortifier to supplement human milk for
immediate use, e.g., preferably within 8-24 hours, more preferably within 0-4 hours, of
mixing with human milk.
[0045] The amount of fortified human milk prepared for a premature infant, for
example, typically ranges from 25 ml to 150 ml a day. Consequently, a single unit dose is
the appropriate amount of fortifier solids to fortify a 25 ml preparation. Multiple
packages can be used to prepare larger feeding volumes, especially for term infants.
[0046] The amount or volume of concentrated liquid human milk fortifier in each unit
dose package includes those embodiments in which the package contains an amount
suitable to prepare an infant's next feeding. These unit dose packages typically contain
sufficient fortifier to provide from about 0.5 g to about 10 g of fortifier solids, more
typically from about 0.8 g to about 7.5 g of fortifier solids, and even more typically from
about 0.85 g to about 6.0 g of fortifier solids.
[0047] The concentrated liquid human milk fortifiers of the present disclosure are
preferably formulated so as to provide fortified human milk having an osmolality of less
than about 500 mOsm/kg water, preferably from about 300 mOsm/kg water to about 400
mOsm/kg water. Based on the disclosure herein, one skilled in the art can readily
formulate the concentrated liquid human milk fortifier with the appropriate carbohydrate
sources and corresponding DE (dextrose equivalence) values to obtain or otherwise
provide for the targeted osmolality of the human milk fortifier when combined with
human milk.
[0048] The concentrated liquid human milk fortifiers are further formulated to have a
low water activity sufficient to reduce or inhibit microbial growth, particularly growth of
C. sakazakii, Clostridium Botulinum, Salmonella spp., Staphylococcus aureus, and
Escherichia coli, as well as many food spoilage microorganisms known in the art.
Preferably, the liquid human milk fortifiers are prepared to have a water activity of less
than 0.90, more preferably less than 0.875, and even more preferably less than 0.86.
[0049] The concentrated liquid human milk fortifiers may suitably have a pH ranging
from about 3.5 to about 8.0, but are most advantageously in a pH range of from about 4.5
to about 7.5, including from about 4.5 to about 7.0, including from about 4.5 to about 6.7,
including from about 4.5 to about 6.5, and including from about 4.5 to about 6.0. In some
embodiments, the pH range is from about 5.5 to about 7.3, including from about 5.5 to
about 7.0, including from about 5.5 to about 6.5, and further including from about 5.5 to
about 6.0. In other embodiments, the pH range is from about 6.2 to about 7.2, including
from about 6.2 to about 7.0, and including from about 6.2 to about 6.5.
Probiotics
[ooso] The concentrated liquid human milk fortifiers of the present disclosure comprise
at least one probiotic. In some embodiments, the concentrated liquid human milk
fortifier includes a combination of probiotics (at least two or more different probiotics)
such that the fortifier provides a gut colonization of various probiotics from various
sources.
[0051] Probiotics are live microorganisms thought to be healthy for the host organism.
Lactic acid bacteria (LAB) and bifidobacteria are the most common types of microbes
used as probiotics. Probiotics maintain the microbial ecology of the gut and show
physiological, immuno-modulatory and antimicrobial effects, such that the use of
probiotics has been found to prevent and treat gastrointestinal diseases and/or disorders
(e.g., NEC), pathogen-induced diarrhea and toxin-producing bacteria, urogenital
infections, and atopic diseases.
[0052] In order for microbes to exhibit beneficial probiotic effects in vivo, the organisms
should survive for extended time periods in the gastrointestinal tract. Therefore, it is
desirable that probiotic strains be selected that possess qualities that prevent their rapid
removal by gut contraction. Effective probiotic strains are able to survive gastric
conditions and colonize the intestine, at least temporarily, by adhering to the intestinal
epithelium.
[0053] Further, the probiotic selected should be capable of surviving manufacturing of
the concentrated liquid human milk fortifier as well as the extended periods of storage of
the fortifier. Accordingly, in some embodiments, a heat resistant probiotic strain may be
used to withstand the heat treatment(s) typically used in manufacturing of the
concentrated liquid human milk fortifier.
[0054] Additionally, as the concentrated liquid human milk fortifier has low water
activity, the fortifier provides a medium that supports dormancy of the added probiotic.
As used herein, "dormant" or "dormancy" refers to a state in which the bacterial cells
have negligible activity, but are ultimately culturable; that is, the bacterial cells are in a
reversible state of metabolic shutdown. This dormancy state will further protect the
probiotic from various processing and storage conditions.
[ooss] In some embodiments, the probiotic may further be treated to provide the
probiotic in a dormant state. By way of example, the probiotic may be in a form such as
a freezedried form, an oil droplet, or a bacterial suspension solution to further protect the
probiotic. In some embodiments, the probiotic is encapsulated prior to addition to the
concentrated liquid human milk fortifier.
[0056] Suitable encapsulation technologies are known in the art. Encapsulation agents or
materials may include any encapsulation materials known in the art for use with
probiotics, including protective hydrocolloids (e.g., pectins, alginates, gums),
carbohydrates, starches, cellulose derivatives, proteins (e.g., dairy, egg, vegetable-based
proteins), fat and waxes, fat derived compounds (e.g., lecithins, mono and diglycerides),
binders, film forming agents, emulsifiers, surface active agents, carriers, dispersing
agents, antioxidants and antimicrobials.
[0057] Non-limiting examples of probiotic strains for use in the concentrated liquid
human milk fortifiers herein include the genus Lactobacillus including L. acidophilus
(e.g., L. acidophilus LA-5 and L. acidophilus NCFM), L. amylovorus, L, brevis, L.
bulgaricus, L. casei spp. casei, L, casei spp. rhamnosus, L. crispatus, L. delbrueckii ssp.
lactis, L.fermentum (e.g., L,fermentum CETC5716), L. helveticus, L.johnsonii, L.
paracasei, L. pentosus, L, plantarum, L. reuteri (e.g., L. reuteri ATCC 55730, L. reuteri
ATCC PTA-6475, and L. reuteri DSM 17938), L. sake, and L. rhamnosus (e.g., L.
rhamnosus LGG and L. rhamnosus HN001); the genus Bifidobacterium including: B.
animalis (e.g., B. animalis spp. lactis Bb-12), B. bifidum, B. breve (e.g., B. breve M-
16V), B. infantis (e.g., B. infantis M-63 and B. infantis ATCC 15697), B. longum (e.g., B.
longum BB536, B. longum AH1205, and B. longum AH1206), and B, lactis (e.g., B. lactis
HN019 and B, lactis Bi07); the genus Pediococcus including: P. acidilactici; the genus
Propionibacterium including: P. acidipropionici, P.freudenreichii, P.jensenii, and P.
theonii; and the genus Streptococcus including: S . cremoris, S . lactis, and S .
thermophilus. Particularly preferred probiotics include B. lactis and L. acidophilus.
[0058] The probiotics may be present in the concentrated liquid human milk fortifier in a
total amount of at least 10 CFU/mL composition, including from about 10 CFU/mL
composition to about 10 CFU/mL composition, and including from about 10 CFU/mL
composition to about 1010 CFU/mL composition.
Extensively Hydrolyzed Casein Protein
|oos9] The concentrated liquid human milk fortifiers of the present disclosure may
include hypoallergenic extensively hydrolyzed casein as a protein source. Generally, the
concentrated liquid human milk fortifiers will include at least 35%, including at least
50%, including at least 60%, including at least 75%, including at least 90% and further
including about 1 0% extensively hydrolyzed casein, by total weight of total protein in
the concentrated liquid human milk fortifier. In one desirable embodiment of the present
disclosure, the concentrated liquid human milk fortifier includes 100% extensively
hydrolyzed casein, by total weight of the protein in the concentrated liquid human milk
fortifier. In this desirable embodiment, the concentrated liquid human milk fortifier is
hypoallergenic. In some embodiments, the concentrated liquid human milk fortifier will
include from about 35% to 100%, including from about 50% to 100%, further including
from about 75% to 100% extensively hydrolyzed casein, by total weight of protein in the
concentrated liquid human milk fortifier. As discussed further below, in some
embodiments of the present disclosure, the concentrated liquid human milk fortifiers of
the present disclosure may optionally include other hypoallergenic or non-hypoallergenic
proteins in addition to the extensively hydrolyzed casein protein.
[0060] Extensively hydrolyzed casein proteins suitable for use in the concentrated liquid
human milk fortifiers of the present disclosure include those having a degree of
hydrolysis of at least 10%, including from about 20% to about 80%, including from about
20% to about 60%, and further including from about 40% to about 60%. Generally, the
extensively hydrolyzed casein has a ratio of total amino nitrogen (AN) to total nitrogen
(TN) of from about 0.2 AN to 1.0 TN to about 0.4 AN to about 0.8 TN. Suitable
commercially available extensively hydrolyzed caseins will generally have a protein level
in the ingredient of from about 50% to about 95%, including from about 70% to about
90%. One suitable commercially available extensively hydrolyzed casein is Dellac CE90,
which is a spray dried powder casein hydrolysate (Friesland Campina Domo, Amersfoort,
The Netherlands).
Stabilizer System
[0061] The concentrated liquid human milk fortifiers of the present disclosure optionally
include a stabilizer system. In one embodiment, the stabilizer system is a single stabilizer
system including octenyl succinic anhydride (OSA) modified potato starch. In another
embodiment, the stabilizer system is a synergistic two component stabilizer system. The
first component is an OSA modified starch, such as an OSA modified corn starch or an
OSA modified potato starch. The second component is a low acyl gellan gum. These two
components act in a synergistic manner to stabilize the concentrated liquid human milk
fortifier and retard the precipitation of nutrients therefrom.
[0062] The OSA modified starch, including the desirable OSA modified corn starch or
OSA modified potato starch, is generally prepared by esterifying a dextrinized,
ungelatinized waxy corn or potato starch with 1-octenyl succinic anhydride. Methods of
this type are well known in the art. One suitable commercially available OSA modified
corn starch is N-CREAMER™ 46 (National Starch Food Innovation, Bridgewater, New
Jersey). A suitable commercially available OSA modified potato starch is ELIANE™
MC160 (AVEBE, The Netherlands).
[0063] The OSA-modified starch is present in the concentrated liquid human milk
fortifier in an amount of from about 0.1% to about 3.5%, including from about 0.6% to
about 2 .0%, including from about 0.8%> to about 1.5%, and further including about 1.2%
by weight of the concentrated liquid human milk fortifier.
[0064] The low acyl gellan gum (also known as and commonly referred to as deacylated
gellan gum) may be a water-soluble polysaccharide produced by fermentation of a pure
culture of Sphingomonas elodea. As used herein, "low acyl" means that the gellan gum
has been treated such that it forms firm, non-elastic, brittle gels, that are heat stable, as
compared to "high acyl" which forms soft, very elastic, non-brittle gels. One suitable
commercially available low acyl gellan gum is Kelcogel F (CP Kelco U.S. Inc., Atlanta
Georgia).
[0065] The low acyl gellan gum is present in the concentrated liquid human milk
fortifier in an amount of from greater than 125 ppm to about 800 ppm, including from
about 150 ppm to about 400 ppm, including from about 200 ppm to about 300 ppm and
further including about 200 ppm.
Macronutrients
00 ] The concentrated liquid human milk fortifiers and concentrated liquid nutritional
compositions of the present disclosure generally comprise carbohydrate, fat, and protein
macronutrients of sufficient types and amounts that, when used alone or in combination
with human milk or other feeding formula, help meet the nutritional needs of the user,
especially the premature infant. The concentration of these macronutrients in the various
embodiments of the present disclosure includes the ranges described hereinafter.
Protein
[0067] The concentrated liquid human milk fortifiers of the present disclosure comprise
a protein suitable for use in infants, especially preterm infants, at concentrations ranging
from about 5% to about 50%, including from about 20% to about 40%, including from
about 5% to about 30%, including from about 10% to about 25%, and also including
from about 15% to about 25%, on a dry weight basis. In some embodiments, the protein
may be at a concentration of less than 10%, on a dry weight basis. In some desirable
embodiments, the protein concentration may be from about 7 to about 15 grams,
including from about 9 to about 12 grams of protein per 100 grams of final liquid
product.
[0068] As noted above, the protein component of the concentrated liquid human milk
fortifiers of the present disclosure is at least partially comprised of extensively
hydrolyzed casein. In a particularly desirable embodiment of the present disclosure, the
protein component of the concentrated liquid human milk fortifier is entirely comprised
of extensively hydrolyzed casein. In embodiments wherein additional proteins sources
(i.e., one or more protein sources in addition to the extensively hydrolyzed protein
source) are to be used in the concentrated liquid human milk fortifier in addition to the
extensively hydrolyzed casein (i.e., the concentrated liquid human milk fortifier protein
component is not 100% extensively hydrolyzed casein), the fortifier may still be made
hypoallergenic by including additional hypoallergenic proteins such as soy protein
hydrolysate, whey protein hydrolysate, rice protein hydrolysate, potato protein
hydrolysate, fish protein hydrolysate, egg albumen hydrolysate, gelatin protein
hydrolysate, pea protein hydrolysate, bean protein hydrolysate, combinations of animal
and vegetable protein hydrolysates, and combinations thereof.
[0069] In this context, the terms "protein hydrolysates" or "hydrolyzed protein" are used
interchangeably herein and include extensively hydrolyzed proteins, wherein the degree
of hydrolysis is most often at least 10%, including from about 20% to about 80%, and
also including from about 20% to about 60%, even more preferably from about 40% to
about 60% . The degree of hydrolysis is the extent to which peptide bonds are broken by a
hydrolysis method. The degree of protein hydrolysis for purposes of characterizing the
extensively hydrolyzed protein component of these embodiments is easily determined by
one of ordinary skill in the formulation arts by quantifying the amino nitrogen to total
nitrogen ratio (AN/TN) of the protein component of the selected formulation. The amino
nitrogen component is quantified by USP titration methods for determining amino
nitrogen content, while the total nitrogen component is determined by the Tecator
Kjeldahl method, all of which are well known methods to one of ordinary skill in the
analytical chemistry art.
[0070] n other embodiments of the present disclosure, the concentrated liquid human
milk fortifier, in addition to the extensively hydrolyzed protein, may include an additional
non-hypoallergenic protein source including for example, partially hydrolyzed or nonhydrolyzed
(intact) protein, and can be derived from any known or otherwise suitable
source such as milk (e.g., casein, whey, lactose-free milk protein isolates), animal (e.g.,
meat, fish), cereal (e.g., rice, corn), vegetable (e.g., soy, pea, bean), or combinations
thereof. The protein can include, or be entirely or partially replaced by, free amino acids
known or otherwise suitable for use in nutritional products, non-limiting examples of
which include L-alanine, L-arginine, L-asparagine, L-aspartic acid, L-carnitine, Lcystine,
L-glutamic acid, L-glutamine, glycine, L-histidine, L-isoleucine, L-leucine, Llysine,
L-methionine, L-phenylalanine, L-proline, L-serine, L-taurine, L-threonine, Ltryptophan,
L-tyrosine, L-valine, and combinations thereof.
Carbohydrate
[0071] The concentrated liquid human milk fortifiers of the present disclosure comprise
a carbohydrate suitable for use in infants, especially preterm infants, at concentrations
most typically ranging up to about 75% by weight on a dry weight basis, including from
about 5% to about 50%», and also including from about 20%» to about 40%», by weight on a
dry weight basis.
[0072] Carbohydrates suitable for use in the concentrated liquid human milk fortifiers
may include hydrolyzed or intact, naturally and/or chemically modified, starches sourced
from corn, tapioca, rice or potato, in waxy or non-waxy forms. Other non-limiting
examples of suitable carbohydrate sources include hydrolyzed cornstarch, maltodextrin
(i.e., non-sweet, nutritive polysaccharide having a DE value less than 20), corn
maltodextrin, glucose polymers, sucrose, corn syrup, corn syrup solids (i.e.,
polysaccharide having a DE value greater than 20), glucose, rice syrup, fructose, high
fructose corn syrup, indigestible oligosaccharides such as fructooligosaccharides (FOS),
and combinations thereof. The carbohydrates may comprise lactose or can be
substantially free of lactose.
[0073] One embodiment of the present disclosure includes a non-reducing carbohydrate
component, which may represent from about 10%> to 100%, including from about 80% to
100%», and also including 100%, by weight of the total carbohydrate in the concentrated
liquid human milk fortifier. The selection of a non-reducing carbohydrate may enhance
the product stability and is generally better tolerated by infants, especially premature
infants. Non-limiting examples of non-reducing carbohydrates include sucrose or other
carbohydrates that do not readily oxidize or react with Tollen's, Benedict's, or Fehling's
reagents. The present disclosure therefore includes those embodiments comprising a
carbohydrate component, wherein the carbohydrate component comprises a mono- and/or
disaccharide such that at least 50%, including from about 80%o to 100%, and also
including 100%, of the mono- and/ or disaccharide is a non-reducing carbohydrate.
Fat
[0074] The concentrated liquid human milk fortifiers of the present disclosure also
comprise a fat component suitable for use in infants, especially preterm infants, at
concentrations most typically ranging up to about 40% by weight on a dry weight basis,
including from about 10% to about 40%, and also including from about 15% to about
37%, and also including from about 18% to about 30%, by weight on a dry weight basis.
[0075] Fats suitable for use in the concentrated liquid human milk fortifiers of the
present disclosure may include coconut oil, soy oil, com oil, olive oil, safflower oil, high
oleic safflower oil, MCT oil (medium chain triglycerides), sunflower oil, high oleic
sunflower oil, structured triglycerides, palm and palm kernel oils, palm olein, canola oil,
marine oils, cottonseed oils, and combinations thereof.
[007 Suitable fats for use in the concentrated liquid human milk fortifiers include
emulsifiers to help the various fortifier components readily disperse when combined with
human milk. Non-limiting examples of suitable emulsifiers include glyceryl
monostearate, monoglycerides, diglycerides, distilled monoglycerides, soya bean lecithin,
polyoxythylene stearate, polyoxyethylene sorbitan mono-oleate, polyoxyethylene
sorbitan monopalmitate, polyoxyethylene sorbitan monostearate, ammonium
phosphatides, polyoxyethylene sorbitan monolaurate, citric acid esters of mono and
diglycerides of fatty acids, tartaric acid esters of mono and diglycerides of fatty acids, and
combinations thereof. Natural soy lecithin is especially useful in this respect.
[0077] The fat component of the concentrated liquid human milk fortifier may therefore
optionally include any emulsifier suitable for use in infant nutritional products.
Emulsifier concentrations in these products may range up to about 10%>, including from
about 0.5% to about 10%, about 1% to about 10%>, even more typically from about 1.5%
to about 5%>, by weight of the total fat component.
[0078] Another aspect of the present disclosure includes those embodiments in which
the weight ratio of fat to protein in the concentrated liquid human milk fortifier is at least
0.3, including from about 0.4 to about 5, and also including from about 2 to about 4.
These ratios may be helpful in further stabilizing the concentrated liquid human milk
fortifier.
[0079] The concentrated liquid human milk fortifiers of the present disclosure also
include those embodiments that comprise as part of the fat component one or more of
arachidonic acid, docosahexaenoic acid, or combinations thereof, alone or in further
combination with linoleic acid, linolenic acid, or both.
Vitamins and Minerals
[0080] The concentrated liquid human milk fortifiers of the present disclosure may
further comprise any of a variety of vitamins, non-limiting examples of which include
vitamin A, vitamin D, vitamin E, vitamin K, thiamine, riboflavin, pyridoxine, vitamin
Bi2, niacin, folic acid, pantothenic acid, biotin, vitamin C, choline, inositol, salts and
derivatives thereof, and combinations thereof.
[0081] The concentrated liquid human milk fortifiers may also further comprise any of a
variety of minerals known or otherwise suitable for use in infant or other nutritional
formulas, non-limiting examples of which include phosphorus, magnesium, calcium,
zinc, manganese, copper, iodine, sodium, potassium, chloride, selenium, and
combinations thereof.
[0082] The concentrated liquid human milk fortifiers of the present disclosure include
those embodiments comprising per 100 kcal of fortifier solids one or more of the
following: vitamin A (from about 250 to about 6500 IU), vitamin D (from about 40 to
about 1200 IU), vitamin K, vitamin E (at least 0.3 IU), vitamin C (at least 8 mg),
thiamine, vitamin B12, niacin, folic acid, pantothenic acid, biotin, choline (at least 7 mg),
and inositol (at least 2 mg).
[0083] The concentrated liquid human milk fortifiers also include those embodiments
comprising per 100 kcal of the fortifier solids one or more of the following: calcium (at
least 50 mg), phosphorus (at least 25 mg), magnesium (at least 6 mg), iodine, zinc (at
least 0.5 mg), copper, manganese, sodium (from about 20 to about 60 mg), potassium
(from about 80 to about 200 mg), chloride (from about 55 to about 150 mg) and selenium
(at least 0.5 meg).
Other Optional Ingredients
[0084] The concentrated liquid human milk fortifiers of the present disclosure may
further optionally comprise other ingredients that may modify the physical, chemical,
aesthetic or processing characteristics of the compositions or serve as pharmaceutical or
additional nutritional components when used in the targeted population. Many such
optional ingredients are known for use in food and nutritional products, including infant
formulas, and may also be used in the concentrated liquid human milk fortifiers of the
present disclosure, provided that such optional materials are compatible with the
materials described herein, are safe and effective for their intended use, and do not
otherwise unduly impair product performance.
[0085] Non-limiting examples of such optional ingredients include preservatives, anti¬
oxidants, various pharmaceuticals, buffers, carotenoids, colorants, flavors, nucleotides
and nucleosides, thickening agents, prebiotics, probiotics, sialic acid-containing
materials, and other excipients or processing aids.
Aseptic Packaging
[0086] In some embodiments, the concentrated liquid human milk fortifiers of the
present disclosure may be sterilized and aseptically packaged. The aseptic packaging can
be accomplished using any of a variety of techniques well known to those of ordinary
skill in the formulation art, so long as the heat treatment is sufficient to achieve long term
shelf stability of the concentrated liquid. In one specific example, an aseptic process is
utilized that includes a high temperature short time (HTST) processing step (i.e., about
165°F (74°C) for about 16 seconds) or an ultra high temperature (UHT) processing step
(i.e., about 292°F (144°C) for about 5 seconds).
[0087] A typical aseptic process in accordance with the present disclosure involves the
preparation of a slurry from one or more fluid combinations that may contain water and
one or more of the following: carbohydrates, OSA modified starch, extensively
hydrolyzed casein protein, fats, vitamins and minerals. This slurry is typically emulsified,
deaerated, homogenized and cooled to form a sterilized formula, and then aseptically
packaged to form a sterilized, aseptically packaged concentrated liquid human milk
fortifier. Various other solutions may be added to the slurry at most any time before,
during, or after processing.
[0088] Suitable aseptic packaging techniques include any of the well known aseptic
packaging methods disclosed in the formulation arts for preparing nutritional
formulation, all of which are generally directed to the sealing or filling of a sterilized
liquid into a sterilized, air-tight container. Many variations on the basic method exist and
are well known to those of ordinary skill in the formulation art, non-limiting examples of
which are described in U.S. Pat. No. 6,096,358 (Murdick et al); U.S. Pat. No. 6,227,261
(Das et al.); and U.S. Pat. No. 6,371,319 (Yeaton et al.), which descriptions are
incorporated herein by reference.
[0089] The aseptically packaged embodiments of the present disclosure may include any
container or package suitable for use with liquid human milk fortifiers and also capable
of withstanding aseptic processing conditions (e.g., high temperature sterilization). Nonlimiting
examples of such containers include single or multi use bags, plastic bottles or
containers, pouches, metal cans glass bottles, foil or other flexible pouches, syringes,
vials, or any other container meeting the above-described criteria.
[0090] The aseptically packaged container for these embodiments is typically sterilized
prior to being filled with its sterilized contents. The container is most typically sterilized
by the application of hydrogen peroxide or other suitable disinfectant to the inside surface
of the container. The hydrogen peroxide or other disinfectant is often applied in an
atomized mist. After a disinfectant is applied, the container may be transported along a
conveyor system during which time the container may be subjected to one or more
sprayings of hot sterilized air, preferably hot, sterilized, dry air. The container is then
preferably injected with nitrogen gas. The aseptically prepared container is then
aseptically filled with sterilized product and sealed.
[0091] For aseptic packaging, the concentrated liquid human milk fortifier is typically
heat treated with a high temperature short time (HTST) process or an ultra high
temperature (UHT) process to sufficiently reduce the bioburden to allow the products to
maintain commercially sterile over an extended shelf-life of the finished product
exceeding about 12 months. The treated formula is then homogenized at 1000 psi or
higher and aseptically packaged.
[0092] In an alternative embodiment, the concentrated liquid human milk fortifiers of
the present disclosure may also be sterilized and retort packaged utilizing conventional
means known in the art.
Methods of Use
[0093] The concentrated liquid human milk fortifier of the present disclosure is used in
combination with human milk, other suitable infant formula, or combination of both,
wherein the resulting fortified human milk or fortified infant formula or combination of
both has an osmolality suitable for oral administration to an infant. As noted, the
osmolality will most typically be less than about 500 mOsm/kg water, more typically
from about 300 mOsm/kg water to about 400 mOsm/kg water.
[0094] As the solids content of the concentrated liquid human milk fortifier has been
increased in some embodiments as described herein, the concentrated liquid human milk
fortifier of the present disclosure may be added directly to human milk (or infant formula
or a combination of human milk and infant formula) in a volume to volume ratio of about
1:10 or less, including from about 1:11 to about 1:14, and also including from about 1:11
to about 1:12. The ratio is ultimately selected based primarily upon the ingredients and
osmolality of the concentrated liquid human milk fortifier and in view of the particular
nutritional needs of the infant. The concentrated liquid human milk fortifier may be
added directly to every feeding or to a sufficient number of feedings (e.g., once or twice
daily) to provide optimal nutrition in view of the particular nutritional needs of the infant.
[0095] Human milk or other infant formula, after fortification with the concentrated
liquid human milk fortifier will most typically have a caloric density ranging from about
40 kcal/fl oz ( 1.4 kcal/ml) to about 80 kcal/fl oz (2.7 kcal/ml), with the 56-80 kcal/fl oz
formulations (1.9-2.7 kcal/ml) being more useful in preterm infants, and the 40-55 kcal/fl
oz (1.4-1.9 kcal/ml) formulations more useful for term infants.
[0096] The methods of the present disclosure include methods of providing nutrition to
infants, especially preterm infants. As noted herein, preterm infants may especially
benefit from the use of human milk fortifiers as the fortifier can provide additional
nutrients to the preterm infant when combined with human breast milk and/or infant
formula to foster quicker growth and development. In one particular embodiment,
nutrition is provided to an infant by the addition of the concentrated liquid human milk
fortifier to human milk, infant formula, or combination thereof, followed by the
administration of the fortified human milk, infant formula, or combination thereof, to the
infant.
0 7 Other alternative methods of the present disclosure include using the human milk
fortifiers as described herein to fortify human breast milk, infant formula, or a
combination of human breast milk and infant formula to provide a fortified nutritional
liquid for administration to an infant, and particularly a preterm infant. In one
embodiment, human breast milk is fortified by mixing the concentrated human milk
fortifier with human breast milk, infant formula, or a combination thereof, in a volume to
volume ratio of from about 1:3 to about 1:9.
[0098] The methods of the present disclosure also include a method of providing
nutrition to users other than infants, such as adults and elderly. This method includes the
addition of the concentrated composition to other liquid nutritionals such as suspensions,
emulsions or clear or substantially clear liquids. The resulting concentrated liquid
nutritional compositions may be used as adult liquid nutritional compositions and
medicinal liquid nutritional compositions.
Manufacture
[0099] The concentrated liquid human milk fortifiers of the present disclosure may be
prepared in accordance with the methods described hereinafte.
[ooioo] In one embodiment, the concentrated liquid human milk fortifier is prepared by
solubilizing and combining/mixing ingredients into a homogeneous aqueous mixture
which is subjected to a sufficient thermal treatment and aseptic filling to achieve long
term physical and microbial shelf stability. It should be recognized that as the probiotic
used in the concentrated liquid human milk fortifier cannot survive the aseptic heat
treatment of the below described manufacturing process, the probiotic should be blended
in after heat treatment, either by sterile stream or direct addition immediately before
filling of a sterilized, air-tight container. Alternatively, the probiotic may be treated for
protection against the conditions of heat treatment by encapsulating a thermo-resistant
probiotic as described herein. The encapsulated thermo-resistant probiotic may then be
included in the concentrated liquid human milk fortifier prior to heat treatment. In yet
other embodiments, the probiotic may be included in a separate sterile package from the
concentrated liquid human milk fortifier, and may be added to the concentrated liquid
human milk fortifier immediately prior to use.
[ooioi] To begin the manufacturing process, macronutrients (carbohydrate, protein, fat,
and minerals) are combined in several slurries together and with water. This blend is
subjected to an initial heat treatment and then tested to verify proper nutrient levels.
Additional detail on this process is provided in the following paragraphs.
[00102] An intermediate aqueous carbohydrate-mineral (CHO-MIN) slurry is prepared by
heating an appropriate amount of water. With agitation, the following soluble ingredients
are added: maltodextrin, potassium citrate, magnesium chloride, potassium chloride,
sodium chloride, and choline chloride. The carbohydrate-mineral slurry is held at
elevated temperature under agitation until added to the blend.
[00103] An intermediate oil slurry is prepared by heating MCT oil and coconut oil to an
elevated temperature and then adding distilled monoglycerides with agitation for a
minimum of 10 minutes in order for the ingredient to dissolve. Soy oil, vitamin A
palmitate, vitamin D3, alpha-tocopheryl-acetate, phylloquinone, ARA, DHA, and mixed
carotenoids are then added with agitation to the oil blend. Insoluble mineral calcium
source and ultra micronized tricalcium phosphate are added to the oil. Gellan gum and
OSA-modified starch are then added to the oil blend with proper agitation. The oil blend
slurry is maintained at an elevated temperature under agitation until added to the blend.
[00104] The blend is prepared by combining the ingredient water, casein hydrolysate, all
of the CHO-MIN slurry and whole oil blend slurry. The blend is maintained at 120°F for
a period of time not to exceed two hours before further processing.
[00105] The blend is then homogenized using one or more in-line homogenizers at
pressures from 1000-4000 psig with or without a second stage homogenization from 100-
500 psig followed by heat treatment using a UHTST (ultra-high temperature short time,
292-297°F for 1-30 seconds) process. After the appropriate heat treatment, the batch is
cooled in a plate cooler to 33-45°F and then transferred to a refrigerated holding tank,
where it is subjected to analytical testing.
[00106] The next step in the manufacturing process involves optionally adding the
probiotic along with any desired vitamins, trace minerals and water in order to reach the
final target total solids, probiotic, and vitamin/mineral contents. The final batch is filled
into a suitable container under aseptic conditions or treated with a terminal sterilization
process so the product will be stable at room temperature for an extended shelf-life.
Additional detail on this process is provided in the following paragraphs.
[001071 A trace mineral/vitamin/nutrient solution (STD1) is prepared by heating water to
80-1 00°F and adding the following ingredients with agitation: potassium citrate, ferrous
sulfate, zinc sulfate, copper sulfate, manganese sulfate, sodium selenate, pyridoxine
hydrochloride, riboflavin, thiamine hydrochloride, cyanocobalamin, folic acid, calcium
pantothenate, niacinamide, biotin, m-inositol, nucleotide/choline premix, L-carnitine, Lleucine,
L-tryptophan, and L-tyrosine.
[00108] A vitamin C solution (STD2) is prepared by adding ascorbic acid to water
solution with agitation.
[00109] All STD1 and STD2 solutions are then added to the refrigerated batch, with
agitation. The appropriate amount of ingredient dilution water is then added to the batch
to achieve a target total solids level of 50-65%. The final batch is then subjected to
appropriate thermal treatment, the probiotic is optionally added, and filled into a suitable
container under aseptic conditions and processes.
[ooiio] The concentrated liquid human milk fortifiers of the present disclosure may, of
course, be manufactured by other known or otherwise suitable techniques not specifically
described or shown herein without departing from the spirit and scope of the present
disclosure. The present embodiments are, therefore, to be considered in all respects as
illustrative and not restrictive and that all changes and equivalents also come within the
description of the present disclosure. The following non-limiting examples will further
illustrate the formulations and methods of the present disclosure.
EXAMPLES
[ooiii] The following examples illustrate specific embodiments and/or features of the
concentrated liquid human milk fortifiers of the present disclosure. The examples are
given solely for the purpose of illustration and are not to be construed as limitations of
the present disclosure, as many variations thereof are possible without departing from the
spirit and scope of the disclosure. All exemplified amounts are weight percentages based
upon the total weight of the formulation, unless otherwise specified.
Examples 1-4
oo ] In Examples 1-4, concentrated liquid human milk fortifiers are prepared in
accordance with the present disclosure. The ingredients for the concentrated liquid human
milk fortifier are shown in the following table. All ingredient amounts are listed as
kilogram per approximately 1000 kg batch of product, unless otherwise specified.
Ingredient (Per 1000 kg) Example 1 Example 2 Example 3 Example 4
Ingredient Water Q.S. Q.S. Q.S. Q.S.
Casein Hydrolysate 221.0 221.0 221.0 221.0
Maltodextrin 154.7 0 221.0 110.5
Sucrose 66.3 221.0 0 110.5
MCT Oil 37.8 37.8 37.8 37.8
Citric Acid 27.6 27.6 27.6 27.6
Tricalcium Phosphate 29.6 29.6 29.6 29.6
OSA modified corn starch 24.0 24.0 0 0
OSA modified potato starch 0 0 24.0 24.0
Soy Oil 22.6 22.6 22.6 22.6
Coconut Oil 13.8 13.8 13.8 13.8
Potassium Citrate 10.4 10.4 10.4 10.4
Magnesium Chloride 6.8 6.8 6.8 6.8
Ascorbic Acid 6.6 6.6 6.6 6.6
ARA Oil 5.2 5.2 5.2 5.2
DHA Oil 4.2 4.2 4.2 4.2
Leucine 3.6 3.6 3.6 3.6
Potassium Chloride 3.4 3.4 3.4 3.4
Tyrosine 2.8 2.8 2.8 2.8
Monoglycerides 780.2 g 780.2 g 780.2 g 780.2 g
Sodium Chloride 690.6 g 690.6 g 690.6 g 690.6 g
M-Inositol 400.0 g 400.0 g 400.0 g 400.0 g
Choline Chloride 320.0 g 320.0 g 320.0 g 320.0 g
Tryptophan 300.0 g 300.0 g 300.0 g 300.0 g
Zinc Sulfate 260.6 g 260.6 g 260.6 g 260.6 g
Niacinamide 254.6 g 254.6 g 254.6 g 254.6 g
Vitamin E 217.4 g 217.4 g 217.4 g 217.4 g
L-Carnitine 200.0 g 200.0 g 200.0 g 200.0 g
Gellan Gum 199.6 g 199.6 g 0 g Og
Calcium Pantothenate 120.0 g 120.0 g 120.0 g 120.0 g
Ferrous Sulfate 104.0 g 104.0 g 104.0 g 104.0 g
Vitamin A Palmitate 51.5 g 51.5 g 51.5 g 5 1.5
Riboflavin 30.0 g 30.0 g 30.0 g 30.0 g
Thiamin Hydrochloride 22.0 g 22.0 g 22.0 g 22.0 g
Pyridoxine Hydrochloride 17.8 g 17.8 g 17.8 g 17.8 g
Cupric Sulfate 12.0 g 12.0 g 12.0 g 12.0 g
Vitamin D3 12.8 g 12.8 g 12.8 g 12.8 g
Lutein 6.4 g 6.4 g 6.4 g 6.4 g
Folic Acid 2.8 g 2.8 g 2.8 g 2.8 g
Beta Carotene 1880.0 g 1880.0 g 1880.0 g 1880.0 g
Biotin 1720.0 g 1720.0 g 1720.0 g 1720.0 g
Manganase Sulfate 1680.0 g 1680.0 g 1680.0 g 1680.0 g
Vitamin K 570.0 g 570.0 g 570.0 g 570.0 g
Sodium Selenate 88.0 g 88.0 g 88.0 g 88.0 g
Vitamin B12 80.0 g 80.0 g 80.0 g 80.0 g
[00113] The concentrated liquid human milk fortifier is prepared by solubilizing and
combining/mixing ingredients into a homogeneous aqueous mixture which is subjected to
a sufficient thermal treatment and aseptic filling to achieve long term physical and
microbial shelf stability.
[00114] To begin the manufacturing process, macronutrients (carbohydrate, protein, fat,
and minerals) are combined in several slurries together and with water. This blend is
subjected to an initial heat treatment and then tested to verify proper nutrient levels.
Additional detail on this process is provided in the following paragraphs.
[eons] An intermediate aqueous carbohydrate-mineral (CHO-MIN) slurry is prepared by
heating an appropriate amount of water to 140-1 60°F. With agitation, the following
soluble ingredients are added: sucrose, maltodextrin, potassium citrate, magnesium
chloride, potassium chloride, sodium chloride, and choline chloride. The carbohydratemineral
slurry is held at 130-150°F under agitation until added to the blend.
[00116] An intermediate oil slurry is prepared by heating MCT oil and coconut oil to 150
to 170°F and then adding distilled monoglycerides with agitation for a minimum of 10
minutes in order for the ingredient to dissolve. Soy oil, vitamin A palmitate, vitamin D3,
vitamin E, vitamin K, ARA-containing oil, DHA-containing oil, lutein, and beta-carotene
are then added with agitation to the oil blend. Insoluble mineral calcium source, and ultra
micronized tricalcium phosphate is added to the oil. Gellan gum and OSA-modified
starch are then added to the oil blend with proper agitation. The oil blend slurry is
maintained at 130-1 50°F under agitation until added to the blend.
[00117] The blend is prepared by combining the ingredient water, casein hydrolysate, all
of the CHO-MIN slurry and whole oil blend slurry. The blend is maintained at 120°F for
a period of time not to exceed two hours before further processing.
[00118] The blend is then homogenized using one or more in-line homogenizers at
pressures from 1000-4000 psig with or without a second stage homogenization from 100-
500 psig followed by heat treatment using a HTST (high temperature short time, 165-
185°F for 15-20 seconds) process. After the appropriate heat treatment, the batch is
cooled in a plate cooler to 33-45°F and then transferred to a refrigerated holding tank,
where it is subjected to analytical testing.
[00119] The next step in the manufacturing process involves adding vitamins, trace
minerals, other ingredients, and water in order to reach the final target total solids and
vitamin/mineral contents. The final pH of the product prior to thermal treatment is also
adjusted. The final batch is filled into a suitable container under aseptic conditions or
treated with a terminal sterilization process so the product will be stable at room
temperature for an extended shelf-life. Additional detail on this process is provided in the
following paragraphs.
[00120] A trace mineral/vitamin/nutrient solution (STD1) is prepared by heating water to
80-100°F and adding the following ingredients with agitation: potassium citrate, ferrous
sulfate, zinc sulfate, copper sulfate, manganese sulfate, sodium selenate, pyridoxine
hydrochloride, riboflavin, thiamine hydrochloride, vitamin B12, folic acid, calcium
pantothenate, niacinamide, biotin, m-inositol, L-carnitine, L-leucine, L-tryptophan, and
L-tyrosine.
[00121] A vitamin C solution (STD2) is prepared by adding ascorbic acid to a water
solution with agitation.
[00122] All STD1 and STD2 solutions are then added to the refrigerated batch, with
agitation. The appropriate amount of ingredient dilution water is then added to the batch
to achieve a target total solids level of 50.0-60.0%. The final pH of the product prior to
thermal treatment is adjusted to >4.6-5.2 by addition of citric acid. The final batch is then
subjected to appropriate thermal treatment and filled into a suitable container under
aseptic conditions and processes.
Example 5
[00123) In this Example, the concentrated liquid human milk fortifier of Example 1 was
prepared and the overall water activity was evaluated. Four replicates of the concentrated
liquid human milk fortifier were evaluated using AquaLab CX-2 (Decagon Devices, Inc.,
Pullman, Washington).
[00124] Prior to evaluating the concentrated liquid human milk fortifier, a standardization
check was run on saturated salt solutions of lithium chloride, magnesium chloride, and
magnesium nitrate. The salt solutions were compared with distilled water. The results of
the standardization check are shown in the table below.
Saturated Salt Solutions Target Standard Actual Reading Temperature (°C)
Lithium Chloride 0.11 0.11 21.7
Magnesium Chloride 0.3 0.305 22.6
Magnesium Nitrate 0.5 0.526 21.8
D Water 1.0 0.995 22.1
[00125] The water activity results of the concentrated liquid human milk fortifier
replicates are shown in the table below. As the data indicate, the liquid human milk
fortifier has a very low water activity that is sufficient to retard the growth of unwanted
microbes during storage.
Replicate Reading Temperature (°C)
1 0.858 22.7
2 0.875 21.9
3 0.862 21.8
4 0.865 21.8
Average 0.865 22.1
Examples 6-9
[00126] Examples 6-9 were made in accordance with examples 1-4, respectively, except
Bifidobacterium lactis (probiotic) (1.0 kg) was added to each after the thermal treatment
and before the batches are filled into a suitable container under aseptic conditions and
processes.
CLAIMS
1. A concentrated liquid nutritional composition, preferably a liquid human milk
fortifier, comprising from 5% to 50% by weight protein, preferably from 20% to
40%, on a dry weight basis,
wherein at least a portion of the protein is extensively hydrolyzed casein,
preferably wherein the casein is hypoallergenic protein, more preferably wherein
the protein is 100% by weight extensively hydrolyzed casein, and
wherein the concentrated liquid nutritional composition comprises a solids
content of greater than 50%» by weight, preferably from 50% by weight to 65%> by
weight, and
wherein the concentrated liquid nutritional composition has a water
activity of less than 0.90, preferably less than 0.875, more preferably less than
0.86.
2. The concentrated liquid nutritional composition of claim 1, additionally comprising a
probiotic.
3. The concentrated liquid nutritional composition of either one of claims 1 or 2, wherein
the composition is an adult liquid nutritional composition.
4. The concentrated liquid nutritional composition of claim 2, comprising from 10 to
10 1 1 CFU/mL probiotic, preferably from 107 to 1010 CFU/mL probiotic.
5. The concentrated liquid nutritional composition of any one of the preceding claims,
wherein the fortifier has a pH of from 4.6 to 6.5, preferably from 4.6 to 5.2.
6. The concentrated liquid nutritional composition of any one of the preceding claims,
further comprising carbohydrate, fat, vitamins, and minerals.
7. The concentrated liquid nutritional composition of any one of the preceding claims,
wherein the concentrated liquid nutritional composition comprises from 20% to
40% by weight protein, on a dry weight basis.
8. The concentrated liquid nutritional composition of any one of the preceding claims,
further comprising a stabilizer system comprising an octenyl succinic anhydride
modified corn starch and a low acyl gellan gum, preferably wherein the octenyl
succinic anhydride modified corn starch is present in an amount of from 0.6% to
2.0% by weight of the concentrated liquid human milk fortifier; preferably
wherein the low acyl gellan gum is present in an amount of from greater than 125
ppm to 800 ppm; preferably wherein the concentrated liquid nutritional
composition is aseptically-sterilized.
9. The concentrated liquid nutritional composition of claim 8, further comprising an
octenyl succinic anhydride modified potato starch.
10. A method of fortifying breast milk comprising mixing a liquid human milk fortifier
with breast milk in a volume to volume ratio of less than or equal to 1:10,
preferably from 1:11 to 1:14, more preferably from 1:11 to 1:12,
the liquid human milk fortifier comprising from 5% to 50% by weight
protein, on a dry weight basis,
wherein at least a portion of the protein is extensively hydrolyzed casein,
preferably wherein the casein is hypoallergenic protein, more preferably wherein
the protein is 100% by weight extensively hydrolyzed casein, and
wherein the liquid human milk fortifier comprises a solids content of
greater than 50%o by weight, preferably from 50%> by weight to 65% by weight,
and
wherein the liquid human milk fortifier has a water activity of less than
0.90, preferably less than 0.86.
11. The method of claim 10, wherein the liquid human milk fortifier further comprises a
probiotic.
12. The method of claim 11, wherein the liquid human milk fortifier comprises from 103
to 10" CFU/mL probiotic, preferably from 107 to 1010 CFU/mL probiotic.
13. The method of either one of claims 1 1 or 12, wherein the probiotic is present in the
liquid human milk fortifier in a form selected from the group consisting of
freezedried, an oil droplet, a bacterial suspension solution, and encapsulated.
14. The method of any one of claims 10 to 13, wherein the liquid human milk fortifier
has a pH of from 4.6 to 5.2.
15. The method of any one of claims 10 to 14, wherein the liquid human milk fortifier
further comprises a stabilizer system comprising an octenyl succinic anhydride
modified corn starch and a low acyl gellan gum.