There is no safe level of lead exposure. Even small amounts can be harmful, especially for young children and pregnant women.

The U.S. Food and Drug Administration (FDA) acknowledges that there is no known safe level of exposure for lead, but set a ...

A small 2019 study in Japan found a toothpaste containing calcium carbonate removed greater amounts of plaque than toothpaste without it. It also found calcium carbonate did not damage gum tissue.

The amount of fluoride in fluoride toothpaste is much more concentrated, at about 1,000 ppm. It is essential not to use too much toothpaste and to avoid swallowing it. Though swallowing a small ...