L-Lysine is an essential amino acid, meaning your body can’t make it—you have to get it from food or supplements. It plays several important roles in your health, and many people take L-lysine supplements for specific skin, immune, and muscle benefits.
What L-Lysine Supplements Do:
1. Helps Prevent Cold Sores (Herpes Simplex Virus)
• Most popular use.
• L-lysine can reduce the frequency, severity, and healing time of cold sores.
• Works by competing with arginine, another amino acid the herpes virus needs to replicate.
2. Supports Collagen Production
• Helps build collagen, which supports healthy skin, bones, and tissues.
• May help with wound healing and skin elasticity.
3. Boosts Immunity
• Plays a role in making enzymes and antibodies.
• Some people take it to support the immune system, especially when under stress.