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

Add Yahoo as a preferred source to see more of our stories on Google. If you're thinking about trying a nano-hydroxyapatite toothpaste but aren't sure if it's right for you, we spoke to dentists 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, ...