Lysine is an amino acid (building block of protein). Lysine is used for treating cold sores, and is also used to improve athletic performance.
Lysine helps your body readily absorb calcium and reduces the amounts of calcium excreted from the body in urine.
Increasing your intake of lysine may help enhance your athletic performance. Amino acids such as lysine are the building blocks of proteins. In conjunction with other amino acids in your body, lysine may help maintain lean body mass and healthy growth and development.