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If a New Zealand summer brings you out in cold sores with the heat, you might be interested to hear about the role of Lysine, an essential amino acid, that helps to support the skin (including lips). Not only for summer, it may help to reduce cold sores in the colder months too.
Supplemental Lysine may help reduce cold sores
Some studies show that using Lysine can reduce the length of time of a cold sore infection and reduce the risk of getting more and the severity.