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

From sensitive teeth to bad breath, these are the toothpastes that cover it all.

While the debate around fluoride continues, many are considering switching their fluoride toothpastes to alternatives that include the popular ingredient nano-hydroxyapatite. "As ingredient labels ...