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

Fluoride, a naturally occuring mineral found in many foods and water, has been a primary ingredient in toothpaste since the 1970s. Despite being widely regarded as safe by the Food and Drug ...

Billions of people around the world dutifully brush their teeth with toothpaste every day, but some are starting to question this status quo. These contrarians see sense in brushing but aren’t sure ...