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

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