A new study of the possible advantages of each of the eight dipeptides
for intravenous nutrition focuses on kinetics of tyrosine and glutami
ne injected intravenously. Tyrosine and glutamine are two of the three
amino acids that are difficult to use directly in the preparation of
nutrient solutions due to low solubility (tyrosine) and limited stabil
ity during autoclaving or storage (glutamine).