essential amino acids
Also found in: Dictionary, Thesaurus, Encyclopedia.
es·sen·tial a·mi·no ac·ids
α-amino acids nutritionally required by an organism that must be supplied in its diet (that is, cannot be synthesized by the organism) either as free amino acid or in proteins.
Farlex Partner Medical Dictionary © Farlex 2012
essential amino acidsA group of eight amino acids (isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan and valine) which are essential for normal growth and development of humans; absence of an essential amino acid results in a negative nitrogen balance. In premature infants, histidine, arginine and cystine are also essential.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
es·sen·tial a·mi·no ac·ids(ĕ-sen'shăl ă-mē'nō as'idz)
The α-amino acids nutritionally required by an organism that must be supplied in its diet (i.e., cannot be synthesized by the organism), either as free amino acids or in proteins.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
essential amino acidsThose AMINO ACIDS that cannot be synthesized in the body and must be included in the diet. They include histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan and valine.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005