L-Lysine plays an important role in calcium absorption. Some evidence suggests that L-lysine supplements may help support a healthy immune system and proper cardiovascular function.

L-Lysine is an essential amino acid, which means it cannot be manufactured by the body and must be obtained through diet or supplements. Lysine is essential for all proteins in the body, including enzymes and antibodies as well as carnitine and collagen, the structural proteins that form all connective tissues such as skin, tendons and bones.