Quantum Health Super Lysine+ Cold Sore Treatment works fast to soothe skin. The active ingredient menthol heals cold sores quickly, naturally and painlessly - and without burning. Apply directly to cold sores at the first sign of tingling for relief and quick healing. This formula also helps prevent cold sores. Super Lysine+ Cold Sore Treatment features lysine, zinc oxide and 14 other vitamins, herbs and minerals.