I heard that L-arginine if used too much can actually cause an outbreak of herpes. Is that true?
L-arginine, which is a key ingredient in most top products. According to herpes researcher Christopher Kagan, M.D., herpes DNA uses L-arginine to replicate itself and form a virus. So by taking L-arginine, a man with herpes could have an outbreak. If you do not have herpes, you do not have to worry.