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Pronunciation: kar′ni-tēn

Definition: A trimethylammonium (betaine) derivative of γ-amino-β-hydroxybutyrate, formed from Nε,Nε,Nε-trimethyllysine and from γ-butyrobetaine; the l-isomer is a thyroid inhibitor found in muscle, liver, and meat extract; l-carnitine is an acyl carrier with respect to the mitochondrial membrane and thus stimulates fatty acid oxidation.

Synonym(s): BT factor, vitamin BT

[L. caro carn-, flesh + ine]

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