Have you ever seen a photo of yourself, checked your smile, and thought, "I could use some teeth whitening"? Well, a lot of us have been there. The good news is that you can give your smile a little ...

"Hydroxyapatite is natural. It is a type of calcium that makes up bones and teeth," says Lai. "Nano-hydroxyapatite relates to ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Nowadays there are plenty of products to help you get whiter teeth, including teeth whitening kits, ...