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Definition of Amino acid, nonessential

Amino acid, nonessential: An amino acid that can be made by humans and so is not essential to the human diet. There are 11 nonessential amino acids: alanine, arginine, asparagine, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine, and tyrosine.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=22839
Last Editorial Review: 6/14/2012

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