Lysine is an essential amino acid necessary for protein synthesis and to help maintain nitrogen balance in the body*. It provides nutritional support to the immune system by balancing levels of Arginine in the body, which is important for healthy tissue of the gums, lips, and mucus membranes.* Lysine may help support bone health by promoting calcium absorption in the intestine.* Along with other amino acids, it may help maintain lean muscle mass and strength.*