Natural Factors L-Lysine provides relief from the herpes simplex virus (HSV), helping reduce the recurrence, severity, and healing time of cold sores. As one of the nine essential amino acids that the body relies on to manufacture protein, L-lysine has important roles in the synthesis of collagen, tissue repair, and the production of hormones and enzymes. This makes L-lysine an important nutrient for maintaining a healthy immune system, especially when combined with an adequate intake of vitamin C.

L-lysine is considered “essential” because the body cannot manufacture it and it must be obtained through dietary sources. People with HSV can include L-lysine as part of their nutritional strategy to help keep the virus in check and prevent flare-ups of uncomfortable lesions around the mouth and genitals.

Natural Factors L-Lysine is a pharmaceutical-grade, free-form amino acid, meaning it is more effective than the form obtained directly from food. Each two-capsule serving provides 1000 mg of L-lysine to be taken three times per day for the most effective absorption. This is a great choice for anyone who is prone to HSV flare-ups, as well as vegetarians and other people who may not get sufficient L-lysine through their diet.