Iodine | Can Salt Make You Smart?
Iodine | Can Salt Make You Smart?  
Podcast: Things I Learned Last Night
Published On: Tue May 05 2026
Description: Are you accidentally hindering your brain health? Discover why iodine deficiency is a silent epidemic and how your simple salt choice affects IQ. In this episode, we dive into the surprising history and biological necessity of iodine, an essential chemical element that plays a critical role in human cognitive development. From its fascinating origins as a 'heavy metal' mineral to its vital function in the thyroid gland and hormone production (T3 and T4), we break down why this once-common nutrient has been slipping from modern diets. You’ll learn how the shifting preference for sea salt and kosher salt, combined with changes in the dairy industry, has contributed to a noticeable drop in average iodine levels since the 1970s. We also explore the historical success of iodized salt in preventing goiters and boosting IQ levels by an estimated 15 points in the 20th century. Whether you're curious about thyroid health, the history of nutrition, or simply want to know why your choice of kitchen staples matters, this deep dive provides essential, actionable health insights. Join us as we unpack the science of brain growth and why getting enough iodine is more important for public health than most realize. Things I Learned Last Night is an educational comedy podcast where best friends Jaron Myers and Tim Stone talk about random topics and have fun all along the way. If you like learning, and laughing a whole lot while you do, then you’ll love TILLN. Watch or listen to this episode today! Become a Patron and Get Early Access to Ad-Free Episodes: ⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠https://tilln.com/support⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠ Episode link: https://tilln.com/iodine Support TILLN & Join The Mailing List: ⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠https://linktr.ee/tillnpodcast⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠ Watch this next: John Harvey Kellogg - https://youtu.be/_eg2Thi2pcg?si=ZcPNQnQWoUCMpy79 Text TILLN to 66866 to become a patron and gain access to ad-free episodes, the exclusive discord, and earn discounts on TILLN Merch. Learn more about your ad choices. Visit megaphone.fm/adchoices