In 2007 Foitzik et al. demonstrated that L-carnitine-L-tartrate promotes human hair growth, suggesting that L-carnitine stimulates hair scalp growth by up regulation of proliferation and down-regulation of apoptosis in follicular cells.
Carnitine is a quaternary ammonium compound primarily responsible for transporting fatty acids throughout cells when lipids are broken down for energy consumption. For this reason, carnitine plays a vital role in the metabolism of many substances. Also a powerful anti-oxidant, carnitine has been used to treat a variety conditions such as heart-disease and diabetes. The biologically active form of carnitine is commonly referred to as L-carnitine.
Both L-carnitine and L-carnitine-L-tartrate are produced by the body. Meat (especially lamb) is a major dietary source of these compounds, which explains why some vegans are deficient in carnitine. Such deficiencies are dangerous because L-carnitine burns fat that is used by the muscular and nervous systems to function properly.
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