Trilex Essentials is an all-natural supplement for cold sores and blisters. It contains a powerful combination of herbs traditionally used to help maintain a healthy immune system. A strong immune system can strengthen your resistance to infections and outbreaks. Containing the essential amino acid L-lysine, the formula can decrease cold sore development and limit duration and recurrence of outbreaks. Trilex Essentials can be used for long-term support to help strengthen the immune system, reduce frequency of outbreaks, and reduce duration and severity of cold sores.