Overview Natural Factors L-Lysine is an essential nutrient that provides relief from the herpes simplex virus (HSV). It works quickly to help reduce the recurrence, severity, and healing time of cold sores. The vegetarian capsule contains no corn, soy, wheat, gluten or yeast to support those on restricted diets. Medicinal Ingredients Each capsule contains: L-Lysine (hydrochloride) 500 mg Non-Medicinal Ingredients Rice starch, vegetarian capsule (carbohydrate gum [cellulose] , purified water, silica), vegetable grade magnesium stearate (lubricant). Advanced Info One of the most natural nutritional aids for the herpes simplex virus (HSV) is the amino acid L-Lysine. It provides cold sore relief by helping to reduce their recurrence, severity, and healing time. L-Lysine is one of nine essential amino acids that the body needs for repairing tissue, forming collagen, and producing hormones. It is considered “essential” because the body cannot manufacture it and it must be obtained through the diet. People who have problems with HSV may need supplemental L-lysine to keep the virus in check. Natural Factors L-Lysine is a free-form amino acid which is more effective than when obtained directly from food. Each 500 mg is delivered in a vegetarian capsule to benefit vegetarians, vegans, or people following restricted diets who may not get enough L-lysine through food sources alone. L-lysine should be an essential part of everyone’s nutritional plan to prevent flare-ups of HSV, in whatever form it may take. For the most effective control of HSV, combine L-lysine supplementation with a low-arginine diet. Taking it with vitamin C and zinc may also provide additional benefits by supporting immune system health.