Lysine
"I tend to get blisters on or very close to my lips which is embarrassing and impossible to hide. Lysine hasn't helped to quell my Herpes Simplex-1, albeit it is surprisingly effective at decreasing the size and aggressiveness of the blisters. I've tried utilizing a daily dosage of ~1000mg everyday annually for three years paired with o-t-c medications(abreva,lysine creams) applied asap after noticing the dreaded tingle. I still managed to get seven to ten outbreaks annually which was the same as before starting daily use. Therefore I only take heavy doses(2-3000mg daily) when I may be lacking sleep, sick, stressed or going to be in the sun for a while. Usually about a week before a possible out break and continue until it's healed."