The battle over whether we should be putting fluoride in our water has reached fever pitch. We’ve got U.S. Health Secretary Robert F. Kennedy Jr. and anti-fluoride activists saying it’s a neurotoxin that’s lowering our IQs. But supporters say that fluoride is a safe and effective way to protect our teeth from cavities, and that stopping water fluoridation wo ... Show More
Sep 25
How to Smell like a Dog, with Ed Yong
Ever wonder why your dog just loves to sniff your junk? Well, it turns out it’s because other animals perceive the world in wild ways that we’re just beginning to understand. So today, we’re immersing ourselves in their world, talking about the cutting-edge science of how animals ... Show More
48m 10s
May 2025
Are we sure about fluoride?
Florida just became the second state to ban fluoride from its water system, which has made some public health experts pretty angry. Just how risky is fluoride really, and why is it so hard for us to get on the same page? Guest: Emily Oster, professor of economics at Brown Univers ... Show More
31m 24s
Sep 2024
Why do we use fluoride on our teeth?
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Chances are you've heard the word "fluoride" said in reference to your teeth. At the dentists office, on your bottle of mouthwash, maybe you've heard it's in tap water? But what is it, what's so special about it, and how does it help our teeth? Does it make them whiter, stro ... Show More
30m 7s
Jun 2025
Ep 179 Fluoride 2: Fighting tooth and nail
In last week’s episode, we traced the history of fluoridation (and the anti-fluoridation movement) to its roots in the early 20th century, but we left you wondering whether there’s anything to back up the health claims that anti-fluoridationists make. Today, we get deep into the ... Show More
1h 3m
Jun 2025
Ep 178 Fluoride 1: The real tooth fairy
Is it just us, or does it seem like every other week there’s a new headline about some state or town banning water fluoridation? As it turns out, this has been going on for decades, basically since fluoride was first introduced. Why are some people opposed to fluoride? Is there a ... Show More
1h 2m