"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." Brushing teeth helps prevent the buildup of plaque, which if left unattended, may lead to tooth decay and ...

If you're trying to whiten your teeth without setting off sensitivity, you’re probably wondering what whitening toothpaste can realistically do for you - and whether it’s worth adding to your routine.