The invention relates to methods, compositions, and kits for the treatment of proteinuria and/or hypertension (e.g., proteinuria and/or hypertension arising from primary renal disease (e.g., focal segmental glomerulosclerosis, glomerular disease) or secondary to other conditions (e.g., diabetes, diabetic nephropathy...

Bioavailable iron-containing parenteral nutrition compositions are provided that are physico-chemically stable. Iron is present in the form of soluble ferric pyrophosphate. Methods of preparation and use of the compositions are provide, as well as kits.