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Natural Factors L-Lysine is an essential amino acid supplement that helps reduce the recurrence of the herpes simplex virus (HSV). It targets stubborn cold sores, helping to reduce severity and healing time. The body needs L-lysine for muscle protein synthesis, and to form collagen and repair tissues such as the skin, tendons, and bones. Each capsule contains 500 mg of L-lysine in its most active free form.

Medicinal Ingredients: 
Each vegetarian capsule contains:
L-lysine (hydrochloride) 500 mg

Non-Medicinal Ingredients: 
Vegetarian capsule (carbohydrate gum [cellulose], purified water), rice flour, vegetable grade magnesium stearate (lubricant), silica.