An essential amino acid, L-Lysine reduces the recurrence and severity of cold sores and accelerates their healing process. It can be taken at the first sign of an outbreak to stop its progression or preventatively if outbreaks are frequent.
L-Lysine is an essential amino acid, meaning the body needs it but cannot manufacture it so you must consume enough in your diet or in a supplement. The best food sources are red meat, fish, dairy, eggs, beans, and legumes. By competing with L-Arginine, another amino acid, L-Lysine helps counteract the Herpes virus that causes cold sores when the immune system is weakened. Fatigue, overwork, intense exercise, and emotional problems can all create the stress that weakens the immune system and brings the Herpes virus out of hiding. It invades target cells and replicates, creating the blisters known as cold sores. As it is difficult to achieve therapeutic levels of L-Lysine from dietary sources alone, supplementation is the most effective tool to inhibit the replication of the Herpes virus and reduce the severity and duration of outbreaks.