How does lysine work for cold sores and what are its effects on treating the condition?

Lysine is an amino acid that may help reduce the frequency and severity of cold sores by inhibiting the replication of the herpes simplex virus. It is believed to work by blocking arginine, another amino acid that the virus needs to grow. Some studies suggest that lysine supplements can help speed up the healing process of cold sores and reduce their recurrence. However, more research is needed to fully understand the effectiveness of lysine in treating cold sores.