Lysine
According to some studies, people taking lysine were less likely to experience recurrences of cold sores. [4] However, the research had certain limits. For instance, there was no particular type of preparation recommended or an optimal dose.
Additionally, more research proves that using lysine may not prevent the occurrence of cold stone, but it doesn’t have a negative effect if tried appropriately.
Lysine is commonly found as an oral supplement, and in some cases, they are made into creams. Before taking an oral supplement, ensure that you discuss it with your healthcare provider first. Some supplements may be contaminated with active elements that can be harmful to humans.