#7 L-carnitine
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This is naturally produced by the body by both the kidneys and the liver when two amino acids called lysine and methionine are synthesized. It is then able to flow freely throughout the body where it provides energy to cells. Taking a L-carnitine supplement may boost physical performance and also may help with weight loss. There is also some evidence that it can help prevent the hardening of the arteries and promote hearth health.
