I've used these many times in the past and if done for an extended period of time they have whitened my teeth a little. The problem is they are gunky and make my mouth feel gross until I can get it all cleaned out etc. And if only used for a short period of time (ie. one box) they haven't...
by Gagirl873 | 2 reviews
8.0
LOVE IT
People always comment on how white my teeth are. The only negative about this product is the slimmy feeling at first, but I do like the way it works!!