Composition of the non-protein nitrogen fraction of goat whole milk powder and goat milk-based infant and follow-on formulae

Int J Food Sci Nutr. 2008 Mar;59(2):123-33. doi: 10.1080/09637480701425585.

Abstract

The non-protein nitrogen fraction of goat whole milk powder and of infant and follow-on formulae made from goat milk was characterized and compared with cow milk powder and formulae. Goat milk infant formula contained 10% non-protein nitrogen, expressed as a proportion of total nitrogen, compared with 7.1% for cow milk formula. Goat follow-on formula contained 9.3% and cow 7.4% non-protein nitrogen. Urea, at 30%, was quantitatively the most abundant component of the non-protein nitrogen fraction of goat milk and formulae, followed by free amino acids at 7%. Taurine, glycine and glutamic acid were the most abundant free amino acids in goat milk powders. Goat milk infant formula contained 4 mg/100 ml total nucleotide monophosphates, all derived from the goat milk itself. Goat milk has a very different profile of the non-protein nitrogen fraction to cow milk, with several constituents such as nucleotides at concentrations approaching those in human breast milk.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acids / analysis
  • Animals
  • Cattle
  • Chromatography, Liquid
  • Female
  • Goats*
  • Humans
  • Infant Food / analysis*
  • Infant Food / standards
  • Infant, Newborn
  • Lactation
  • Milk / chemistry*
  • Milk, Human
  • New Zealand
  • Nitrogen Compounds / analysis*
  • Nucleotides / analysis
  • Nutritive Value
  • Seasons
  • Urea / analysis

Substances

  • Amino Acids
  • Nitrogen Compounds
  • Nucleotides
  • Urea