Amino acid absorption

  • Since the first edition, significant advances have been made in our understanding of the fate of dietary protein in the gut. There is now overwhelming evidence that the intestinal absorption of peptides in different species of farm animals is quantitatively important (Chapter 3). Nevertheless, outstanding questions remain. The significance of peptide-bound uptake relative to free amino acid absorption by gut epithelia needs to be quantified. Dietary manipulation of the two forms of absorption has yet to be addressed as well as the relative nutritional advantages of peptide-bound amino acids.
  • There is also a need to explain why, in growing poultry at least, high-protein diets depress utilization of the limiting amino acid (Chapter 14).

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