carnitine (L-carnitine)

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carnitine (L-carnitine)

a short-chain nitrogen-containing carboxylic acid, mainly located in skeletal and cardiac muscle cells. Over half the daily requirement is provided from meat and dairy products in a balanced diet; the remainder is synthesized in the liver. It has been hypothesized that supplementary ingestion of L-carnitine might upregulate the capacity to transport fatty acids into mitochondria matrix where they are metabolized and so increase their oxidation, thus benefiting both endurance athletes and those wishing to reduce their body fat. Research has not supported these claims. See also ergogenic aids; appendix 4.4 .
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