Top critical review
A waste of money. Do not buy.
on July 28, 2018
As I suspected, this product does absolutely nothing to whiten teeth. If your teeth are covered with something that causes them to be discolored (common for smokers), any product that is abrasive enough to remove the exterior discoloration will whiten your teeth. You could use baking soda instead of paying $20 for this product.
By the way... abrasive compounds (like charcoal or baking soda) should not be used long-term.