Dietary electrolyte balance can influence on acid-base balance, digestibility and absorption of nutrition, the metabolism of amino acid by changing the correlative enzyme.

Peptide play the important role in digestion, resorption and metabolism of amino acid. In the article, its releasing, mechanism, trophism and physiologic function were reviewed.

The vitamins B1, B12 and folic acid are included due to their essential role in the metabolism of the amino acid homocysteine.