The Rich Roll Podcast

Kevin Hall, Ph.D., is a physicist-turned-nutrition scientist whose rigorous research has upended some of our most sacrosanct beliefs about metabolism, dieting, and weight loss. This conversation explores why diets fail, the truth behind the "slow metabolism" myth, how ultra-processed foods hijack our biology, and why the 800-pound gorilla driving the obesity epidemic isn't willpower—it's our toxic food environment. He also opens up about his decision to leave the NIH after 20 years due to political interference with his research. Kevin is an honest actor, always trying to set matters to rights amidst a hurricane of nutritional misinformation. Enjoy! Show notes + MORE Watch on YouTubeNewsletter Sign-Up Today’s Sponsors: On: High-performance shoes & apparel crafted for comfort and style👉🏼https://www.on.com/richroll Momentous: High-caliber human performance products for sleep, focus, longevity, and more. For listeners of the show, Momentous is offering up to 35% off your first order 👉🏼https://www.livemomentous.com/richroll Seed: Use code RICHROLL20 for 20% OFF your first order👉🏼https://www.seed.com/RichRoll Roka: Unlock 20% OFF your order with code RICHROLL👉🏼https://www.ROKA.com/RICHROLL BetterHelp: Get 10% OFF the first month 👉🏼https://www.betterhelp.com/richroll Check out all of the amazing discounts from our Sponsors👉🏼https://www.richroll.com/sponsors  Find out more about Voicing Change Media at https://www.voicingchange.media and follow us @voicingchange

Rutger Bregman is a Dutch historian, bestselling author, and the guy who went viral telling Davos billionaires to pay their taxes. This conversation is a salve for the crisis of meaning percolating through modern life. We explore Rutger's pragmatic antidote—moral ambition—and discuss why a quarter of workers believe their jobs are socially useless, what the abolitionists teach us about coalition-building, and why factory farming may be the ethical abomination future historians judge us for most harshly. Rutger's conviction is rare and infectious. By the end of our conversation, I was so inspired that I committed $25K to his organization’s new US Food System Reform Program, a cause area that is deeply important to me. Final Note: Through December 31st, every dollar to moralambition.org/food is matched.  I hope you’ll consider joining me today in making a donation to this impactful organization. See the links in our newsletter, on our website, and in our Substack. Let’s lean into our own moral ambition and do something truly meaningful, together. Show notes + MORE Watch on YouTube Newsletter Sign-Up Today’s Sponsors: On: High-performance shoes & apparel crafted for comfort and style👉🏼https://www.on.com/richroll Roka: Unlock 20% OFF your order with code RICHROLL👉🏼https://www.ROKA.com/RICHROLL AG1: Get their best offer ever – Welcome Kit, Omega 3's, D3+K2, Flavor Sampler, plus AGZ sleep supplement FREE ($126 in gifts)👉🏼https://www.drinkAG1.com/richroll Bon Charge: Get 15% OFF all my favorite wellness products w/ code RICHROLL👉🏼https://www.boncharge.com BetterHelp: Get 10% OFF the first month👉🏼https://www.betterhelp.com/richroll Squarespace: Use code RichRoll to save 10% off your first order of a website or domain👉🏼http://www.squarespace.com/RichRoll Check out all of the amazing discounts from our Sponsors👉🏼https://www.richroll.com/sponsors Find out more about Voicing Change Media at https://www.voicingchange.media and follow us @voicingchange

Gregg Renfrew is the founder of Beautycounter and now Counter—a pioneer in the clean beauty movement. Five years after our first exchange, Gregg returns with her story about navigating imposed change. After losing her company, she bought it back out of foreclosure in 48 hours—then let it die to save it. Today, we explore identity collapse, decoupling self-worth from success, why selling control means losing it, and the beauty industry's toxin loopholes. Along the way, we confront rebuilding when everything you've created is stripped away. This is an honest conversation about ego, humility, and the courage to begin again. Enjoy! Show notes + MORE Watch on YouTube Newsletter Sign-Up Today’s Sponsors: Go Brewing: Use the code Rich Roll for 15% OFF👉🏼https://www.gobrewing.com Seed: Use code RICHROLL20 for 20% OFF your first order👉🏼https://www.seed.com/RichRoll20 Squarespace: Use code RichRoll to save 10% off your first order of a website or domain👉🏼http://www.squarespace.com/RichRoll Whoop: The all-new WHOOP 5.0 is here! Get your first month FREE👉🏼https://www.join.whoop.com/Roll Momentous: High-caliber human performance products for sleep, focus, longevity, and more. For listeners of the show, Momentous is offering up to 35% off your first order👉🏼https://www.livemomentous.com/richroll On: High-performance shoes & apparel crafted for comfort and style👉🏼https://www.on.com/richroll LMNT: Get a free LMNT Sample Pack with any purchase👉🏼https://www.drinklmnt.com/richroll   Check out all of the amazing discounts from our Sponsors👉🏼https://www.richroll.com/sponsors  Find out more about Voicing Change Media at https://www.voicingchange.media and follow us @voicingchange

Roll On returns! Just in time for the holiday gauntlet. Adam Skolnick and I unpack three questions the season demands: how to navigate family gatherings when the same dynamics play out like clockwork, what rock bottom actually means (hint: it's a launchpad for transformation, not a life sentence), and why I've traded rigid goals for something more like trajectory. We get into the superpower of extreme neutrality, why everyone is right from their perspective, and morning pages as the unlock you didn't know you needed. We also celebrate Adam's debut novel “American Tiger”—finally out in the world! Last but not least, we crown our favorite films of 2025. Enjoy!  Show notes + MORE Watch on YouTube Newsletter Sign-Up Today’s Sponsors: On: High-performance shoes & apparel crafted for comfort and style👉🏼https://www.on.com/richroll LMNT: Get a free LMNT Sample Pack with any purchase👉🏼https://www.drinklmnt.com/richroll  Pique: Get up to 20% OFF plus a FREE rechargeable frother and glass beaker with your first subscription👉🏼https://www.piquelife.com/richroll Momentous: High-caliber human performance products for sleep, focus, longevity, and more. For listeners of the show, Momentous is offering up to 35% off your first order👉🏼https://www.livemomentous.com/richroll Bon Charge: Get 15% OFF all my favorite wellness products w/ code RICHROLL👉🏼https://www.boncharge.com AG1: Get their best offer ever – Welcome Kit, D3+K2, Flavor Sampler, plus a FREE bonus gift ($126 in value!)⁠https://www.drinkAG1.com/richroll Rivian: Electric vehicles that keep the world adventurous forever👉🏼https://www.rivian.com Check out all of the amazing discounts from our Sponsors👉🏼https://www.richroll.com/sponsors  Find out more about Voicing Change Media at https://www.voicingchange.media and follow us @voicingchange

Todd Marinovich is a former NFL quarterback, USC Rose Bowl champion, and the subject of the ESPN 30 for 30 documentary "The Marinovich Project." This conversation explores the duality of engineered perfection and performance-based love. We discuss his father's authoritarian methods, the identity crisis of living someone else's dream, his harrowing addiction, the moment his father's approval paradoxically ended his motivation, and his journey toward self-compassion through art and recovery. Through it all, Todd elucidates what it means to reclaim your humanity after decades of self-defiance. Todd's story is raw and achingly human. And his message is clear—hope is a decision. Enjoy! Show notes + MORE Watch on YouTube Newsletter Sign-Up Today’s Sponsors: Bon Charge: Use coupon code RICHROLL20 to save 20%👉🏼https://www.boncharge.com   On: High-performance shoes & apparel crafted for comfort and style👉🏼https://www.on.com/richroll   AG1: Get their best offer ever – Welcome Kit, D3+K2, Flavor Sampler, plus a FREE bonus gift ($126 in value!)⁠https://www.drinkAG1.com/richroll  Squarespace: Use code RichRoll to save 10% off your first order of a website or domain👉🏼http://www.squarespace.com/RichRoll        Roka: Unlock 20% OFF your order with code RICHROLL👉🏼https://www.ROKA.com/RICHROLL Check out all of the amazing discounts from our Sponsors👉🏼https://www.richroll.com/sponsors   Find out more about Voicing Change Media at https://www.voicingchange.media and follow us @voicingchange