Essential Amino Acid Definition

Methionine is an essential amino acid.
Methionine is an essential amino acid. Todd Helmenstine

Definition: An essential amino acid is an amino acid which an organism needs to ingest because it is necessary for nutrition and cannot be synthesized in the body.

Also Known As: indispensable amino acid

Examples: Isoleucine and leucine are examples of amino acids which are essential amino acids in humans.

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Helmenstine, Anne Marie, Ph.D. "Essential Amino Acid Definition." ThoughtCo, Nov. 27, 2014, thoughtco.com/definition-of-essential-amino-acid-605104. Helmenstine, Anne Marie, Ph.D. (2014, November 27). Essential Amino Acid Definition. Retrieved from https://www.thoughtco.com/definition-of-essential-amino-acid-605104 Helmenstine, Anne Marie, Ph.D. "Essential Amino Acid Definition." ThoughtCo. https://www.thoughtco.com/definition-of-essential-amino-acid-605104 (accessed January 24, 2018).