L-carnitine

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Antioxidants
Also known as carboxylic acid, it is often erroneously labeled an amino acid (which it is not). It has been claimed to have miraculous (albeit unsubstantiated) properties for enhancing the metabolization of fat when taken orally. There is research in animal studies showing it has anti-aging benefits when taken orally (Source: Annals of the New York Academy of Sciences, April 2002, pages 133–166). However, there is no known benefit for skin when it is applied topically in skin-care products, though it may have antioxidant properties. See antioxidant

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