"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. The fluoride debate is raging on. Fluoride has long been at the center of one of the most persistent public health ...

Robert F. Kennedy, Jr., the new head of the U.S. Department of Health and Human Services, has said he'll recommend removing fluoride from the country's drinking water. Juneau, Alaska, did so in 2007.

Throughout her career, Ayse Asatekin, associate professor of chemical and biological engineering at Tufts University, has sought to use filters to prevent illness and protect the environment. One ...

WASHINGTON - AUGUST 15: The exterior of the U.S. Department of Health and Human Services is seen in Washington, DC. (Photo by Alex Wong/Getty Images) The Department of Health and Human Services and ...

Hydrofluorosilicic acid is an additive used to fluoridate community water supplies in the U.S. Like many chemicals, it is caustic in its concentrated form. But it never reaches consumers, and the ...

ECUA Executive Director Bruce Woody told the News Journal are monitoring the re-emergence of the debate over adding fluoride to water. “Our response at this point is one of wanting to obtain more ...