Episode #185: Is Cortisol Good Or Bad?

Anurag Singh is currently Chief Medical Officer at Timeline that develops next generation advanced nutritional and skincare products targeting improvements in mitochondrial and cellular health. With a M.D. in internal medicine and a Ph.D. in immunology, his experience includes work for top consumer health (Nestlé, Nestlé Health Science) and startups companies (Amazentis/Timeline). He’s authored > 50 articles for top science journals, been awarded >20 patents and has designed and led > 50 randomized clinical trials. His research over the past decade across multiple clinical trials on the postbiotic Urolithin A (Mitopure) and its health benefits has led to the launch of multiple consumer products. Full show notes: https://bengreenfieldlife.com/podcast/timelineimmunity/ Episode Sponsors: Jaspr: Breathe air so clean you can smell the difference with the Jaspr commercial-grade air purifier. Visit Jaspr.co/ben and use code BEN for 10% off. Troscriptions: Explore Troscriptions' revolutionary buccal troche delivery system that bypasses digestion to deliver pharmaceutical-grade, physician-formulated health optimization compounds directly through your cheek mucosa for faster onset and higher bioavailability than traditional supplements. Discover a completely new way to optimize your health at troscriptions.com/BEN or enter BEN at checkout for 10% off your first order. Timeline Nutrition: Give your cells new life with high-performance products powered by Mitopure, Timeline's powerful ingredient that unlocks a precise dose of the rare Urolithin A molecule and promotes healthy aging. Go to shop.timeline.com/BEN and use code BEN to get 20% off your order. Organifi: Get the restful sleep you need with the most soothing ingredients! Organifi is a delicious superfood tea with powerful superfoods and mushrooms to help you sleep and recover so you can wake up refreshed and energized. Go to Organifi.com/Ben for 20% off your order. Truvaga: Balance your nervous system naturally with Truvaga's vagus nerve stimulator. Visit Truvaga.com/Greenfield and use code GREENFIELD30 to save $30 off any Truvaga device. Calm your mind, focus better, and recover faster in just two minutes. Quantum Upgrade: Recent research has revealed that the Quantum Upgrade was able to increase ATP production by a jaw-dropping 20–25% in human cells. Unlock a 15-day free trial with the code BEN15 at quantumupgrade.io.See omnystudio.com/listener for privacy information.

4 Syys 51min

In this episode with Caleb Applegate, you’ll step into the cutting edge of health, technology, and community-building as we dive into LIFE Network—the company we co-founded to transform how people connect over wellness. You’ll get an insider’s look at the newly upgraded app, designed to enrich your health journey while cutting through the clutter and distractions of traditional platforms. If you’re ready to cut through the noise, connect with a like-minded community, and discover what’s next at the intersection of health, tech, and wellness, this is an episode you won’t want to miss. Full show notes: https://bengreenfieldlife.com/bencaleb2 Episode Sponsors: IM8: Ditch the cabinet full of supplements—IM8 packs 92 powerhouse ingredients into one delicious scoop for all-day energy, gut health, and cellular support. Go to IM8Health.com and use code BEN for an exclusive gift—fuel your body the right way! Unmatched Outlier: Outlier by Unmatched is the world's first pre-workout featuring paraxanthine instead of caffeine, delivering sustained energy and focus without the crash, plus premium ingredients like Cognizin for cognitive enhancement and NO3-T for incredible muscle pumps. Try it at unmatchedsupps.com/bengreenfield with special bulk discounts: 15% off one, 20% off two, or 25% off three. Xtendlife: Future-proof your health with Xtendlife’s Total Balance—100+ bio-active ingredients in a gender-specific formula designed for longevity and complete daily support. Use code BEN15 at www.xtend-life.com/ben for 15% off sitewide, plus free shipping. Manukora: You haven’t tasted or seen honey like this before—so indulge and try some honey with superpowers from Manukora. If you head to manukora.com/ben or use code BEN, you’ll automatically get $25 off your Starter Kit. Pique: Pique Teas are where plants and science intersect to produce teas and supplements of unrivaled efficacy, purity, and convenience. Go to Piquelife.com/Ben to get 20% off for life, plus a free starter kit with a rechargeable frother and glass beaker to elevate your ritual.See omnystudio.com/listener for privacy information.

30 Elo 1h 5min

In this powerful conversation with Bill Rapier, you’ll discover both the practical and philosophical sides of self-defense, preparedness, and living with vigilance and intention. Bill—a former Navy SEAL and founder of Amtac Shooting—shares not only his deep expertise in firearms, blades, and integrated combatives, but also the mindset that will help you train responsibly and live ready. You’ll learn why carrying tools like firearms and knives is less about aggression and more about having “violence insurance”—a rare but critical safeguard for protecting yourself and others when it truly matters. Whether it’s choosing your first holster, sharpening threat assessment skills, or building resilience, this episode gives you the tools and mindset to elevate your preparedness (while staying true to your values and priorities). Full show notes: https://bengreenfieldlife.com/amtac Episode Sponsors: MASA Chips: Introducing the best guilt-free snack on the market: classic, seed oil-free tortilla chips with only 3 natural ingredients. Go to masachips.com/greenfield and get 25% off your first order! Quantum Upgrade: Recent research has revealed that the Quantum Upgrade was able to increase ATP production by a jaw-dropping 20–25% in human cells. Unlock a 15-day free trial with the code BEN15 at quantumupgrade.io. Ketone-IQ: Ketones are a uniquely powerful macronutrient that can cross the blood-brain barrier and increase brain energy and efficiency. With a daily dose of Ketone-IQ, you'll notice a radical boost in focus, endurance, and performance. Save 30% off your first subscription order of Ketone-IQ at Ketone.com/BENG. Seatopia: Seatopia delivers lab-tested, sushi-grade seafood that’s verified to be mercury-safe and free from detectable microplastics. Frozen at peak freshness, you'll receive the benefits of super nutrients like EPA, DHA, selenium, zinc, and vitamin D. Right now, you can save 15% on your first box and get a FREE 1:1 chef-led cooking class to kick-start your journey to cooking gourmet seafood at home by going to seatopia.fish/ben or by using code BEN at checkout. LMNT: Everyone needs electrolytes, especially those on low-carb diets, who practice intermittent or extended fasting, are physically active, or sweat a lot. Go to DrinkLMNT.com/BenGreenfield to get a free sample pack with your purchase! Our Place: Upgrade to Our Place today and say goodbye to forever chemicals in your kitchen. Go to fromourplace.com and enter my code BEN at checkout to receive 10% off sitewide.See omnystudio.com/listener for privacy information.

28 Elo 1h 1min

In this fascinating episode, Dr. Melissa Grill-Petersen guides you through the latest science on female longevity, metabolic health, and strategies for healthy aging. You’ll get to discover why so many of the health and nutrition recommendations you hear might not actually be tailored to women’s unique needs—especially when it comes to hormones, metabolic flexibility, and the impact of stress. Whether you’re new to the world of anti-aging or ready to fine-tune your protocol, you’ll walk away empowered, informed, and equipped to thrive at any age. Full show notes: https://bengreenfieldlife.com/womenpeptides Episode Sponsors: BIOptimizers Magnesium Breakthrough: The 7 essential forms of magnesium included in this full-spectrum serving help you relax, unwind, and turn off your active brain after a long and stressful day so you can rest peacefully and wake up feeling refreshed, vibrant, and alert. Go to bioptimizers.com/ben and use code ben10 for 10% off any order. Truvaga: Balance your nervous system naturally with Truvaga's vagus nerve stimulator. Visit Truvaga.com/Greenfield and use code GREENFIELD30 to save $30 off any Truvaga device. Calm your mind, focus better, and recover faster in just two minutes. BON CHARGE: BON CHARGE is a holistic wellness brand with a wide range of products that naturally address the issues of modern life. Their products can help you sleep better, perform better, recover faster, balance hormones, reduce inflammation, and so much more. Go to boncharge.com/GREENFIELD and use the coupon code GREENFIELD to save 15%. ZBiotics Pre-Alcohol Probiotic: The world's first genetically engineered probiotic that helps break down the toxic byproduct of alcohol, Zbiotics Pre-Alcohol allows you to enjoy your night out and feel great the next day. Order with the confidence of a 100% money-back guarantee and 15% off your first order at zbiotics.com/BEN15. Organifi Green Juice: Reset your body with Organifi Green Juice! With 11 superfoods, 600mg of ashwagandha, and certified organic ingredients, it curbs cravings, supports stress, and fuels your day. Go to organifi.com/Ben for 20% off!See omnystudio.com/listener for privacy information.

22 Elo 1h 9min

I’m always on the lookout for a good book on sleep, and I recently read one of the better titles I’ve found in the past few years: How to Sleep Like a Caveman: Ancient Wisdom for a Better Night's Rest—Based on the Evolutionary Science of Sleep from Saber-Toothed Tigers to Modern Insomnia. Written by today’s podcast guest, Dr. Merijn van de Laar, one of the world’s leading sleep scientists, it is a bit like Sapiens meets Why We Sleep in an evolutionary romp through the science of sleep—and how you can get better rest. If you’re curious about the science of sleep, what our evolutionary past can teach you, and actionable ways to wake up truly rested, this episode is for you. Full show notes: https://bengreenfieldlife.com/cavemansleep Episode Sponsors: CAROL Bike: The science is clear—CAROL Bike is your ticket to a healthier, more vibrant life. And for a limited time, you can get $100 off yours with the code BEN. Don't wait any longer, join over 25,000 riders and visit carolbike.com/ben today. Gameday Men’s Health: Gameday Men's Health offers science-backed, physician-led men's health optimization with personalized protocols for testosterone, peptide therapy, ED treatment, and more—helping you perform at your best whether you're training hard or keeping up with life. Visit gamedaymenshealth.com/bengreenfield for a free testosterone test and consultation at a clinic near you. Just Thrive: For a limited time, you can save 20% off a 90-day bottle of Just Thrive Probiotic and Just Calm at justthrivehealth.com/ben with promo code BEN. That’s like getting a month for FREE—take control today with Just Thrive! Calroy: Head on over to calroy.com/ben and save over $50 when you purchase the Vascanox (a breakthrough product providing nitric oxide support for up to 24 hours with a single dose) and Arterosil (a premier supplement to support the endothelial glycocalyx—the fragile inner lining of the entire vascular system) bundle at calroy.com/ben. Plus, you'll receive a free canister of 2-in-1 Nitric Oxide Test Strips with a 3-pack bundle purchase. Ketone-IQ: Ketone-IQ delivers science-backed performance fuel that increases power output by 19%, reduces fatigue by 10%, and naturally boosts EPO production for better oxygen delivery—trusted by elite athletes like Jon Jones and Olympic champions. Save 30% on your subscription plus get a free gift with your second shipment at Ketone.com/BENG.See omnystudio.com/listener for privacy information.

21 Elo 1h 2min

In this fascinating solosode, you'll receive a range of practical hacks and cutting-edge research to elevate your health, fitness, and mental performance. The episode kicks off with an unexpected experiment featuring retatrutide—a triple-action peptide that targets multiple hunger and metabolism pathways. You'll explore the nuances of microdosing retatrutide, and I'll reveal how tiny tweaks in dosing can yield powerful effects on appetite, cognition, and even social behavior around food. This is an episode brimming with actionable takeaways, emerging science, and a healthy dose of curiosity—poised to ignite your journey to a more complete, boundless you. Full show notes: https://bengreenfieldlife.com/493 Episode Sponsors: Timeline Nutrition: Give your cells new life with high-performance products powered by Mitopure, Timeline's powerful ingredient that unlocks a precise dose of the rare Urolithin A molecule and promotes healthy aging. Go to shop.timeline.com/BEN and use code BEN to get 20% off your order. LVLUP Health: I trust and recommend LVLUP Health for your peptide needs as they third-party test every single batch of their peptides to ensure you’re getting exactly what you pay for and the results you’re after! Head over to lvluphealth.com/BGL and use code BEN15 for a special discount on their game-changing range of products. LeelaQ: Not only do LeelaQ’s products neutralize EMFs, increase ATP production, optimize HRV, and improve blood flow, but they've been third-party proven to do so in placebo-controlled double-blind studies. Visit leelaq.com and use code BEN10 for 10% off. Thrive Market: Discover how Thrive Market delivers premium, clean-label groceries from top brands like Simple Mills and Primal Kitchen at up to 30% off retail prices, making healthy eating accessible without compromising your budget or values. Skip the junk without overspending—visit thrivemarket.com/ben for 30% off your first order plus a FREE $60 gift. Quantum Upgrade: Recent research has revealed that the Quantum Upgrade was able to increase ATP production by a jaw-dropping 20–25% in human cells. Unlock a 15-day free trial with the code BEN15 at quantumupgrade.io.See omnystudio.com/listener for privacy information.

16 Elo 30min

In this episode, you’ll get to explore the fascinating world of photobiomodulation and cutting-edge light therapy with one of its true innovators, Kris Sweeting. You'll dive deep into the science, application, and surprising real-world stories behind the red, UVA, and UVB light devices that are making waves in health, wellness, and even the celebrity circuit. Whether you’re interested in getting the most from light therapy for your brain, skin, or mitochondria—or you want to geek out over the bleeding edge of biohacking tech—you’ll find a treasure trove of insights in this episode. Full show notes: https://bengreenfieldlife.com/emrpodcast Episode Sponsors: Pique: Pique Teas are where plants and science intersect to produce teas and supplements of unrivaled efficacy, purity, and convenience. Go to Piquelife.com/Ben to get 20% off for life, plus a free starter kit with a rechargeable frother and glass beaker to elevate your ritual. Organifi Green Juice: Reset your body with Organifi Green Juice! With 11 superfoods, 600mg of ashwagandha, and certified organic ingredients, it curbs cravings, supports stress, and fuels your day. Go to organifi.com/Ben for 20% off! Seatopia: Seatopia delivers lab-tested, sushi-grade seafood that’s verified to be mercury-safe and free from detectable microplastics. Frozen at peak freshness, you'll receive the benefits of super nutrients like EPA, DHA, selenium, zinc, and vitamin D. Right now, you can save 15% on your first box and get a FREE 1:1 chef-led cooking class to kick-start your journey to cooking gourmet seafood at home by going to seatopia.fish/ben or by using code BEN at checkout. MOSH: MOSH's signature blend offers a plant-based high-protein bar. They are a great source of vitamin D and an excellent source of vitamin B12. Head to moshlife.com/BEN to save 20% off, plus FREE shipping on either the Best Sellers Trial Pack or the new Plant-Based Trial Pack. Unmatched: Outlier by Unmatched is the world's first pre-workout featuring Paraxanthine instead of caffeine, delivering sustained energy and focus without the crash, plus premium ingredients like Cognizin for cognitive enhancement and NO3-T for incredible muscle pumps. Try it at unmatchedsupps.com/bengreenfield with special bulk discounts: 15% off one, 20% off two, or 25% off three.See omnystudio.com/listener for privacy information.

14 Elo 1h 2min

In this episode with André Smith, you'll get to explore the journey behind one of the most intriguing wellness technologies of our time: the HOCATT. If you’ve ever wondered what it would be like to sit inside a futuristic “sauna” that does much more than just make you sweat—think ozone therapy, PEMF, frequency microcurrents, carbonic acid, and far infrared—all stacked into one, this show is for you. With a deep passion for enhancing humans' quality of life, André has developed multiple technologies that aim to improve personal wellness. His entrepreneurial spirit is driven by a commitment to holistic health practices and a desire to offer practical, effective solutions to people around the world. Full show notes: https://bengreenfieldlife.com/hocattpodcast Episode Sponsors: Calroy: Head on over to calroy.com/ben and save over $50 when you purchase the Vascanox (a breakthrough product providing nitric oxide support for up to 24 hours with a single dose) and Arterosil (a premier supplement to support the endothelial glycocalyx—the fragile inner lining of the entire vascular system) bundle at calroy.com/ben. Plus, you'll receive a free canister of 2-in-1 Nitric Oxide Test Strips with a 3-pack bundle purchase. Hiya: Give your kids the full-body nourishment they need to grow into healthy adults. I’ve secured a special deal with Hiya on their best-selling children's vitamin—get 50% off your first order today! To claim this deal, you must go to hiyahealth.com/BEN (it is not available on their regular website). Ketone-IQ: Ketones are a uniquely powerful macronutrient that can cross the blood-brain barrier and increase brain energy and efficiency. With a daily dose of Ketone-IQ, you'll notice a radical boost in focus, endurance, and performance. Save 30% off your first subscription order of Ketone-IQ at Ketone.com/BENG. Prolon: Prolon's 5-Day Fasting Nutrition Program is scientifically tested and patented to nourish your body while keeping it in a physiological fasted state. Right now, you can save 15% on your order when you go to prolonlife.com/BEN. BEAM Minerals: If you want to up your mineral game, give BEAM Minerals a try. Go to beamminerals.com and use code BEN at checkout for 20% off your order.See omnystudio.com/listener for privacy information.

9 Elo 1h 3min