Is fluoride making us stupid?

Fluoride is a common additive in toothpaste and the water supply of some countries. It's purportedly good for dental health, but some evidence suggests that it's actually harmful. Discover the dark side of fluoride in this podcast from HowStuffWorks.com. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.