lysine

Lysine is an essential amino acid, meaning your body cannot produce it on its own, so you must get it from your diet. It plays a key role in building proteins, which are vital for muscle development, enzyme production, and immune function. Foods rich in lysine include meat, fish, dairy, beans, and legumes. Adequate lysine intake supports overall health, helps prevent cold sores caused by the herpes virus, and contributes to tissue repair and growth. Since the body depends on dietary sources for lysine, it's important to include good protein options in your meals.