What are L-carnitine and D-carnitine?

May 26, 2022

L-carnitine and d-carnitine are chiral isomers。

L-carnitine, also known as carnitine, is an amino acid that promotes the conversion of fat into energy. Red meat is the main source of L-carnitine and has no side effects on human body. D-carnitine is one of the two forms of carnitine in nature. It is toxic and harmful to human body. It can cause muscle pain and severe muscle atrophy.

L-carnitine，as a nutritional enhancer, is widely used in food, feed, clinical medicine and other fields. At present, L-carnitine produced by pure chemical synthesis and d-carnitine reuse contains a certain amount of d-carnitine. Chemical synthesis has become the main preparation method of L-carnitine because of its low cost and high benefit. In infant milk powder, L-carnitine has become a commonly added nutritional fortifier. The establishment of detection and analysis method of d-carnitine is of great significance to ensure the quality and safety of infant milk powder.

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