I've been using this stuff for acne for a long time. It works okay but it's no holy grail product, in fact I am strongly considering switching to something different. I think that it kills the acne bacteria but it dries out the rest of my skin so badly!! It stings a bit and makes it itchy too. Also, if you over use it I don't think it works as effectively. I think I have been using too much and now it doesn't seem to work on my pimples as well. Sometimes it works on really small pimples but not the big ones at all. Does nothing for blackheads or whiteheads either.