I read recently on this very forum about a couple vitamins that are for hair health, one being Niacin, another being Inositol.
So I took 250mg of Niacin (one tablet) and immediately my face started turning red and getting very warm. Then my back started getting red, and then my legs started getting red. I didnt know then that it was Niacin responsible and thought that one of my other supplements was having a reaction with one of these other two I tried for the first time.
I ended up calling my doctors office, who got ahold of the doctor on duty. As soon as I said “niacin” he knew immediately. He told me some patients of his cannot handle this and that aspirin helps negate its side effects (of course all I have is Tylenol) He says he uses this to raise some peoples blood pressure. It sure raised mine. I say be careful if trying this, it will surely increase your bloodflow, but at the risk of feeling and looking like your on fire.