Is fasting actually good for you?

Plus: A potential replacement for opioids; fungi we should fear; and how red hair affects your health [A SOLUTION FOR CHRONIC PAIN?]( [VIEW ONLINE]( [A SOLUTION FOR CHRONIC PAIN?]( This week: The [science behind fasting]( why you might want to rethink [low-cal sweeteners]( promising news about [pain killers that could replace opioids]( the real science behind [pop culture zombies]( and what having [red hair]( for your health. Want more info on on living longer, smarter, and healthier? [Sign up here]( to receive our Mind, Body, Wonder newsletter every week. It's free! PHOTOGRAPH BY JASPER DOEST [Can fasting really help you live longer? Here's what the science says.]( About 10 percent of Americans say they fast intermittently—but the meaning of "intermittent fasting" varies widely, from 12 hours a day, 16 hours, alternate days, or one day a week. It might be easy to chalk it up as a passing fad, but [research has shown that intermittent fasting has real health benefits](. Here’s how it really works—and how a new diet that tricks your body into thinking it’s fasting may have similar benefits. [HOW FASTING WORKS]( [WHEN SHOULD YOU EAT? It's just as important as what you eat. +]( PHOTOGRAPH BY TRISTAN SPINSKI [Low-calories sweeteners might not be as good for us as we thought]( Some artificial sweeteners disrupt the microbes in our gut—in ways that might actually increase the risk of weight gain, diabetes, and heart disease. [LINK TO OBESITY]( PHOTOGRAPH BY IMYSKIN, GETTY IMAGES [What to know about Ozempic, TikTok's favorite weight loss drug]( Scientists caution that for weight loss, the diabetes medication's long-term safety and efficacy aren't settled. That hasn't stopped influencers. [WHAT ARE THE RISKS?]( PHOTOGRAPH BY KEVIN D. LILES, THE NEW YORK TIMES/REDUX [Could this be the solution to chronic pain—and the opioid crisis?]( Monoclonal antibodies were used to protect the vulnerable from COVID-19. Now, early research suggests [these lab-made proteins may provide non-addictive, long-lasting relief]( from a variety of chronic pain conditions, including low back pain, neuropathic pain, osteoarthritis, rheumatoid arthritis, and cancer. [THE FUTURE OF PAIN RELIEF]( [PAIN RELIEF FROM CANNABIS: Is it real, or is it the placebo effect? +]( Read more about the opioid crisis: • [We're learning more about what causes addiction—and how to fight it. >]( • [Fentanyl is killing more teens than ever. A 'miracle drug' could save their lives. >]( [THE FUNGI THAT WE SHOULD FEAR]( PHOTOGRAPH BY ALEX HYDE, NATURE PICTURE LIBRARY [Could a parasitic fungus evolve to control humans?]( The zombie-creating fungus in the video game and television show The Last of Us is very real—but there are many other fungi to fear. Of the 5 million fungal species in the world, a few hundred are dangerous to people. [REAL ZOMBIE SCIENCE]( More on nature's threats: • [The next pandemic may be caused by a drug-resistant fungus. We are not prepared. >]( [HOW RED HAIR AFFECTS YOUR HEALTH]( PHOTOGRAPH BY KIKE CALVO, NAT GEO IMAGE COLLECTION There's more research on the variations in human hair color than you might expect, and the science makes it clear that crimson locks are not becoming increasingly rare. [But why do redheads exist in the first place—and what else does the gene influence?]( [WHAT CAUSES RED HAIR?]( [How 'everywhere chemicals' help uterine fibroids grow >]( [Why the new Alzheimer's drug is eliciting both optimism and caution >]( [Sperm counts worldwide are plummeting faster than we thought >]( [Fruits and vegetables are less nutritious than they used to be >]( ) [SHOP]( [DONATE]( [SUBSCRIBE]( [TRAVEL]( [READ OUR LATEST STORIES]( [SHOP]( [DONATE]( [SUBSCRIBE]( [TRAVEL]( [FB]( [Twitter]( [IG]( Clicking on the Facebook, Twitter, Instagram, and National Geographic Channel links will take you away from our National Geographic Partners site where different terms of use and privacy policy apply. This email was sent to: {EMAIL}. Please do not reply to this email as this address is not monitored. This email contains an advertisement from: National Geographic | 1145 17th Street, N.W. | Washington, D.C. 20036 [Stop all types of future commercial email]( from National Geographic regarding its products, services, or experiences. [Manage all email preferences]( with the Walt Disney Family of Companies. © 2023 National Geographic Partners, LLC, All rights reserved.