Naturopathy : Amino Acids Table A

Classification of Amino Acids with respect to their essentiality:

*Histidine is required for infants but its essentiality for adults has not been clearly established.

It will be seen from this statement that nine amino acids are essential for maintenance of nitrogen equilibrium in human bodies. The estimated requirements of essential amino acids for infants, children and adults are given in Table B. Men in the older age group appear to differ in their requirements. Studies seem to suggest an increase need for methionine and lysine for them. Infants and children have proportionally greater demands for essential amino acids than adults. In addition, infants require histidine as an essential amino acid.