For those of you interested in whitening your smile up with out buying strips that cost more than you would care to spend. I decided to try out this mouthwash and the toothpaste combined and I like it. As for the deoderant, which I may be forced to switch since my husband has poured out his distress over the scent. I seriously seen an improvement! In an article http://www.livestrong.com/article/135141-what-are-causes-dark-underarms/ I read that the cause of dark under arms can come from the medical condition known as acanthosis nigricans among other things. Shaving, Bacterial Infection, Antiperspirants, and Deoderants are other causes for this. I always believed that this darkening that can happen under the arm came from pregnancy, but I realize skin darkening is during pregnancy, it’s not supposed to go on for years afterwards.