Should you rinse or not after brushing your teeth? Some toothpaste labels warn not to swallow the product, which implies that you should. On the other hand, doing so rinses away much of the cavity-protective fluoride. Here's a look at what the latest research says to do.
Researchers caused a stir when they suggested that fluoride—a chemical used in toothpaste and added to the public water supply in much of the U.S. to help prevent dental cavities—may impair brain development in children. But don't swear off tap water and toothpaste just yet: The overwhelming evidence shows that the benefits of fluoride far outweigh the risks, especially for kids.