Picking toothpaste is one of the most important decisions you can make for dental hygiene. Supermarket brands offer a variety, each marketed to address specific concerns such as whitening, sensitivity ...

"Hydroxyapatite is natural. It is a type of calcium that makes up bones and teeth," says Lai. "Nano-hydroxyapatite relates to the particle size. These are between 20 and 80 nanometers and are much ...