told me in an email that hydrogen peroxide or carbamide peroxide are “most effective in a gel form that is held against your teeth (think whitening strips, gel in trays, etc.).” Each method ...

These kits come packed with strong whitening agents, usually using hydrogen peroxide or carbamide peroxide. If that doesn't sound like something you're interested in, there are also gentler ...

In-office whitening treatments can be expensive, so many people turn to at-home teeth whitening. Here's what you need to whiten your teeth at home.