Fluoride in Drinking Water Has No Effect on IQ or Brain Function, Study Finds

A new study finds no evidence that fluoridated drinking water affects children’s IQ or the cognitive abilities of older adults. Fluoride in drinking water helps prevent tooth decay and cavities, and good dental health is important for overall health.

April 16, 2026   TODAY’S TOP STORY Fluoride in Drinking Water Has No Effect on IQ or Brain Function, Study Finds READ ON   What Is Citric Acid? Benefits, Uses, Safety & Side Effects READ ON   A Guide to Getting Rid of Love Handles READ ON   Immunoglobulins and Immunoglobulin Blood Tests: Function and Purpose READ ON MORE STORIES PRODUCT PICK 10 Best Fitness and Exercise Apps: Your Complete Routine   Need a fitness reset? We reveal the 10 top-rated apps that take the guesswork out of your routine and keep you laser-focused on your goals. SHOP NOW TODAY'S RESOURCE Healthline's Weight Management Newsletter   Expert advice, tips to build healthy habits, and the latest on nutrition and fitness delivered straight to your inbox. SIGN UP NOW What we’re reading next • The Risks of Unmanaged Spasticity • Download: 14-Day Stress Reset Calendar • How to Know If Your Depression Treatments Need to Change • Ask the Expert: What’s the Future of EGFR-Positive NSCLC Treatment? FOLLOW US ON INSTAGRAM We'd love to hear from you! Send us a message at newsletters@healthline.com to let us know what else you’d like to see. Until then, Take care of yourself, and we’ll see you again soon! View in browser Did a friend send you this email? Subscribe here. To see all newsletters, click here. Privacy   |   Unsubscribe We may feature your messages to our inbox within our content. Please do not provide any personal identifiable information. Replies may be edited for length and clarity. For more, see our Privacy Policy. Our website services, content, and products are for informational purposes only. Healthline does not provide medical advice, diagnosis, or treatment and should not be used as a substitute for medical advice from a healthcare professional. Healthline encourages you to make any treatment decisions with your healthcare professional. Every product we recommend has gone through either Healthline’s or Optum Now’s vetting processes. If you buy through links on this page, we may receive a small commission or other tangible benefit. Healthline has sole editorial control over this newsletter. Potential uses for the products listed here are not health claims made by the manufacturers. Healthline and Optum Now are owned by RVO Health. © 2026 RVO Health 1101 Red Ventures Drive Fort Mill, SC 29707

10 Ways to Boost Serotonin Naturally and Without Medication

Plus: Can’t Remember Your Childhood? What Might Be Going On

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Customize your newsletter with topics you’re interested in!   April 15, 2026   TODAY’S TOP STORY 10 Ways to Boost Serotonin Naturally and Without Medication READ ON   Can’t Remember Your Childhood? What Might Be Going On READ ON   A Guide to Animal-Assisted Therapy for Depression READ ON   Sponsored   RECIPE OF THE DAY Shrimp-topped Salad with Spicy Vinaigrette This salad is high in fiber while being low calorie and low in carbs. The vinaigrette contains lime and hot sauce, which provides a refreshing kick. This salad is high in fiber while being low calorie and low in carbs. The vinaigrette contains lime and hot sauce, which provides a refreshing kick.   START COOKING Please consult a healthcare provider or nutritionist for individual dietary needs related to specific health conditions. LIVING WELL More healthy reads 🩺 Are Borderline Personality Disorder (BPD) and ADHD Connected? 🫀 When Is Heart Failure a Disability? 💤 Will an All-Nighter Get Your Sleep Back on Track? And 7 More Sleep Cycle FAQs 🌻 6 Surprising Causes of Frizzy Hair –  and 8 Ways to Combat It   TODAY'S RESOURCE Grounding techniques for anxiety     Calm your mind and bring yourself back to the current moment. DOWNLOAD NOW       NEW PODCAST EPISODE Rock Bottom to a Netflix Documentary: The Philly Captain Shares His Bipolar Journey   Hosted by Gabe Howard   Jon McCann, better known as “The Philly Captain,” is the subject of the Emmy Award-winning Netflix documentary “The Turnaround,” produced by Barack and Michelle Obama. In this moving and often hilarious interview, he joins host Gabe Howard to discuss the “story behind the story.”   Listen now HEALTHLINE HUBS Treatment for Anxiety   Treatment for Depression   Tips for Better Sleep Tips for Better Sleep   Nutrition Nutrition   Emotional Well-Being   Building Relationships FOLLOW US ON INSTAGRAM Until then, Take care of yourself, and we’ll see you again soon! View in browser Did a friend send you this email? Subscribe here. To see all newsletters, click here. Privacy   |   Unsubscribe We may feature your messages to our inbox within our content. Please do not provide any personal identifiable information. Replies may be edited for length and clarity. For more, see our Privacy Policy. Our website services, content, and products are for informational purposes only. Healthline does not provide medical advice, diagnosis, or treatment and should not be used as a substitute for medical advice from a healthcare professional. Healthline encourages you to make any treatment decisions with your healthcare professional. Every product we recommend has gone through either Healthline’s or Optum Now’s vetting processes. If you buy through links on this page, we may receive a small commission or other tangible benefit. Healthline has sole editorial control over this newsletter. Potential uses for the products listed here are not health claims made by the manufacturers. Healthline and Optum Now are owned by RVO Health. © 2026 RVO Health 1101 Red Ventures Drive Fort Mill, SC 29707