Essential amino acid


noun, plural: essential amino acids

An amino acid in which an organism cannot synthesize or can synthesize but in insufficient amounts, thus needs to be supplied in the diet


In humans, the common amino acids may be classified as either essential or nonessential. In general, the essential amino acids include: histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine.

Also called:

  • indispensable amino acid


See also:

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