Plasma amino acid concentrations in newborn infants breast-fed ad libitum.
Plasma amino acid concentrations were measured in peripheral venous blood of 40 newborn infants breast-fed ad libitum. When these data are compared with amino acid concentrations of umbilical cord artery plasma, only lysine and threonine show a striking decrease after birth: the concentrations of hydroxyproline, asparagine, glutamine, proline, cystine, leucine, tyrosine, and ornithine significantly increase during the first days of life. The high-protein concentration of colostrum and transitional milk may explain this observation.
D000596:Amino Acids / Q000097:blood*; D001942:Breast Feeding; D006801:Humans; D007231:Infant, Newborn; D008239:Lysine / Q000097:blood; D013912:Threonine / Q000097:blood; D014469:Umbilical Arteries
D000596:Amino Acids; D013912:Threonine; D008239:Lysine