I heard good things about Niacin (and Glutamin), and about 8 months ago, I was trying to stimulate a discussion on the topic by creating a thread, but I did not stimulate too much of such conversation, and I have been taking those as supplements since starting that thread, yet I am not sure if I feel any results from adding those two to my regime.  I do already take vitamin C and I started taking Zinc recently too.. and gosh I hate to admit all of the supplements that I added recently, so it is not really clear if there are abilities to be scientific if too many are added.. and then a kind of wondering whether any of them are helping anything.