As the virus and other infectious agents are usually kept in check by the immune system, it is essential to boost the ability to fight infection. Eating a diet high in fruit and vegetables helps to reinforce your immune defences.
Arginine and lysine are two amino acids that play central roles as building blocks of proteins. Some evidence, sometimes conflicting, exists on these amino acids. They are thought to affect the herpes simplex virus in different ways: arginine-rich proteins are required for multiplication of virus whereas lysine can help to inhibit the virus. Avoiding foods rich in arginine, such as chocolate, peanuts or almonds, may help to minimise the duration of a cold-sore outbreak. Additionally, foods rich in lysine such as eggs, tuna, soy beans or parmesan cheese, may help optimise the duration of recovery.