A home tooth–whitening kit contains carbamide peroxide, a bleach that can remove both deep and surface stains and actually changes your natural tooth color. If you have coffee-stained teeth, a tooth–bleaching kit can help. With some kits, you apply a peroxide-based gel (with a small brush) to the surface of your teeth.
These stains originate inside your teeth, so you won't be able to remove them at home with just a whitening toothpaste. Instead, at-home whitening kits or a .