herpes simplex
"I've had herpes for 15 years and used to suffer with painful outbreaks.  When searching the web, I found out about Lysine.  I don't take it daily because I rarely have outbreaks, but I probably will.  Currently, I've been taking 4 500 mg tablets daily when I feel that an outbreak is coming on. Either the outbreak doesn't come at all or it is less severe and goes away after a day or two.  I also take Vitamin C with the Lysine and it's been very successful.  I think I may take a Lysine vitamin daily to avoid the outbreaks altogether."