Lysine is one of numerous amino acids that the body needs for growth and tissue repair. It is classified as one of the nine "essential" amino acids because you need to get it from outside sources such as foods or supplements--in other words the body can't make it on its own.
Lysine is required for growth and bone development in children.lysine-rich foods for lowering cholesterol, improving athletic performance, and enhancing recovery after surgery.The most promising application of lysine is its use in managing and preventing painful and unsightly herpes sores caused by the herpes simplex virus (HSV).