
AGEIST
The AGEIST podcast is where we rewrite life after 50. Hosted by David Stewart, founder of AGEIST and Super Age, we talk with extraordinary people—scientists, creatives, and thinkers—about living vibrantly in your 50s, 60s, 70s and beyond. From longevity science to emotional well-being, fitness to purpose, we explore the tools and mindsets that help us stay curious, energized, and deeply engaged with life. This isn’t about aging gracefully—it’s about living boldly.
Latest episodes

Nov 27, 2024 • 52min
Ron Kastner: What’s Your “Why” for Life?
Ron Kastner’s story highlights the transformative power of finding your “why.” In this episode, he shares how a single moment of clarity—recognizing his desire to be present for his daughters—sparked a complete overhaul of his lifestyle. Ron explains why defining a personal purpose is essential for sustaining habits that support health and vitality, especially as we age. With actionable tips on exercise, nutrition, and mindset, this episode will inspire you to uncover your own “why” and use it to build a joyful, energized life.What kind of SuperAger are you? Take our quiz today and find out! Visit: ageist.com/quizThanks To Our SponsorsTally Health – from longevity supplements to epigenetic testing, Tally Health is your partner for healthy aging. Use code “AGEIST” for 20% off at tallyhealth.comOneSkin – Scientifically proven to reduce skin age, OS-1 is our number one wrinkle-fighting topical product. Use code: SUPERAGE15 at oneskin.co/superage to save 15% on your first purchaseMomentous Supplements – Committed to the best in human performance, Momentous converts gold-standard scientific testing into real world impact via the highest quality health and sport supplements. Use code AGEIST at checkout to save 20% off your first order or visit www.livemomentous.com/ageistKey Moments“Your why is your fuel—it drives everything, from staying healthy to creating a meaningful life.”“Without a clear why, it’s hard to commit to the work of taking care of yourself.”“Once you find your why, everything else—exercise, diet, mindfulness—becomes not just easier, but joyful.”Connect with Ron Kastnerwww.RonKastner.comBook: A Life Yet to Live: Finding Health, Vitality, and Joy After 60 Full Interview TranscriptConnect with AGEISTNewsletterInstagramWebsiteSay hi to the AGEIST team!

Nov 21, 2024 • 1h 3min
Dr. Marc Cohen Reveals Sauna Study Misconceptions
Dr. Marc Cohen reveals a significant oversight in the celebrated Kuopio Ischemic sauna study, which linked sauna use with a marked decrease in all-cause mortality: the critical role of cold exposure. While the research attributes dramatic health benefits to saunas alone, Dr. Cohen points out that in Finland, the practice inherently includes cold plunges—a factor often excluded in Western interpretations. He explains how alternating between hot and cold amplifies cardiovascular benefits, detoxification, and mental resilience. This episode challenges long-held assumptions and offers practical advice for harnessing the true power of sauna and cold therapy.What kind of SuperAger are you? Take our quiz today and find out! Visit: ageist.com/quizThanks To Our SponsorsSuppCo – SuppCo is currently in beta and users can get 100% FREE access by going to supp.co/AGEIST. Podcast listeners will also get early access to SuppCo's founding membership when it launches in early 2025.LMNT Electrolytes — our favorite electrolytes for optimal hydration. Listeners receive a free 8-serving sample pack with their purchase at DrinkLMNT.com/AGEIST. OneSkin – Scientifically proven to reduce skin age, OS-1 is our number one wrinkle-fighting topical product. Use code: SUPERAGE15 at oneskin.co/superage to save 15% on your first purchaseKey Quotes from Dr. Marc Cohen"Wellness is about creating a culture of health that’s as contagious as illness.""The edge of discomfort is where resilience begins.""Extreme wellness is about finding balance through opposing forces, like hot and cold."Connect with Dr. Marc CohenWebsite: https://drmarc.coFull Interview TranscriptConnect with AGEISTNewsletterInstagramWebsiteSay hi to the AGEIST team!

Nov 14, 2024 • 31min
Inside the Global Wellness Summit 2024
David Stewart shares highlights from his keynote at the Global Wellness Summit in Scotland, where he explored wellness trends and the expanding importance of optimism in health. Research shows that a positive mindset and simple health practices—like quality sleep and exercise—can have more impact than high-cost interventions. Today, wellness is a booming $6.3 trillion industry now outpacing tech, with a growing demand for travel, mental health support, and eco-friendly retreats. Finally, David recounts inspiring encounters with industry leaders like Wim Hof, that expanded his own perspectives on wellness.What kind of SuperAger are you? Take our quiz today and find out! Visit: ageist.com/quizThanks To Our SponsorsTally Health – from longevity supplements to epigenetic testing, Tally Health is your partner for healthy aging. Use code “AGEIST” for 20% off at tallyhealth.comMomentous Supplements – Committed to the best in human performance, Momentous converts gold-standard scientific testing into real world impact via the highest quality health and sport supplements. Use code AGEIST at checkout to save 20% off your first order or visit www.livemomentous.com/ageistManukora Honey – Support your immunity, digestive health, and vitality with the highest grade Manuka honey from Manukora–full of antioxidants, bioactive prebiotics, and antibacterial properties. Use code AGEIST for $25 off your Starter Kit at manukora.com/ageistKey Quotes:"The wellness industry is now the third largest in the world—it even beats tech!""An optimistic mindset is a key lever in wellness; it’s not just about resources or information.""Our biggest problem as humans is the limits of our imagination of what’s possible."Full Interview TranscriptConnect with AGEISTNewsletterInstagramWebsiteSay hi to the AGEIST team!

Nov 7, 2024 • 45min
What Dr. Amy Killen Says About Aging
Dr. Amy Killen joins the podcast to discuss how real-time health metrics and personalized tracking are revolutionizing modern wellness. With her expertise in regenerative medicine, Dr. Killen provides a roadmap for optimizing health and making informed choices based on individual needs. She explores the benefits of emerging health tech like continuous glucose monitoring and wearable devices, which empower individuals to make better decisions. Dr. Killen’s insights encourage listeners to take ownership of their health, making every step purposeful and personalized.What kind of SuperAger are you? Take our quiz today and find out! Visit: ageist.com/quizThanks To Our SponsorsOur Place – our top cookware brand for non-toxic, PFA-free pots and brands. Use code “AGEIST” for 10% off at fromourplace.comLMNT Electrolytes — our favorite electrolytes for optimal hydration. Listeners receive a free 8-serving sample pack with their purchase at DrinkLMNT.com/AGEIST.OneSkin – Scientifically proven to reduce skin age, OS-1 is our number one wrinkle-fighting topical product. Use code: SUPERAGE15 at oneskin.co/superage to save 15% on your first purchaseKey Quotes:"Take ownership of how you age because no one else is going to do it for you.""We're all running experiments on ourselves every day, often without tracking the results.""The tools we have now let us personalize our health choices like never before."Connect with Dr. Amy KillenWebsiteHumanaut HealthHopboxReputable.HealthFull Interview TranscriptConnect with AGEISTNewsletterInstagramWebsiteSay hi to the AGEIST team!

Oct 31, 2024 • 56min
Dr. Scott Sherr: Prevent Winter Colds
Find yourself feeling a sniffle coming on as winter descends? In this episode, Dr. Scott Sherr shares actionable insights into strengthening immunity, particularly during the colder months. He explains the importance of balancing our exposure to germs for immune resilience and highlights nutrient-rich diets, hydration, and supplements like cordyceps mushrooms to boost immune function. Dr. Sherr also offers practical tips on using heat therapies and how fasting can enhance immune response. This discussion provides effective strategies for staying healthy and managing stress year-round.What kind of SuperAger are you? Take our quiz today and find out! Visit: ageist.com/quizThanks To Our SponsorsTally Health – From longevity supplements to epigenetic testing, Tally Health is your partner for healthy aging. Use code “AGEIST” for 20% off at tallyhealth.comOneSkin – Scientifically proven to reduce skin age, OS-1 is our number one wrinkle-fighting topical product. Use code: SUPERAGE15 at oneskin.co/superage to save 15% on your first purchaseMomentous Supplements – Committed to the best in human performance, Momentous converts gold-standard scientific testing into real world impact via the highest quality health and sport supplements. Use code AGEIST at checkout to save 20% off your first order or visit www.livemomentous.com/ageistKey Quotes:"Exposure to germs helps optimize the immune system.""Balancing the sympathetic and parasympathetic nervous system is key to overall health.""Cordyceps mushrooms enhance immunity and support better sleep through natural adenosine modulation."Connect with Dr. Scott SherrTroscriptionsInstagramFull Interview TranscriptConnect with AGEISTNewsletterInstagramWebsiteSay hi to the AGEIST team!

Oct 24, 2024 • 51min
Dr. Leah Johansen: How Self-Belief Impacts Disease
In this episode, Dr. Leah Johansen shares how belief systems and emotional well-being directly impact physical health. She explains the intricate relationship between self-worth and chronic disease, revealing practical methods to achieve optimal health. Through breathwork, awareness, and understanding our electromagnetic field, Dr. Johansen shows how we can reduce stress and elevate our lives. Listen in to discover how changing your mindset can lead to lasting health improvements.What kind of SuperAger are you? Take our quiz today and find out! Visit: ageist.com/quizThanks To Our SponsorsTally Health – from longevity supplements to epigenetic testing, Tally Health is your partner for healthy aging. Use code “AGEIST” for 20% off at tallyhealth.comLMNT Electrolytes — our favorite electrolytes for optimal hydration. Listeners receive a free 8-serving sample pack with their purchase at DrinkLMNT.com/AGEIST.DIVI – take back control of your hair and scalp health, and do it with Divi's clean, science-backed ingredients. Listeners get 20% off your first Divi order at diviofficial.com/AGEIST or enter code "AGEIST" at checkout.Key Quotes:"If you're over in fear, your executive function and your ability to problem-solve is highly diminished.""We are not just chemical beings; we are electrochemical, and our thoughts and belief systems influence us at the cellular level.""You have to care about yourself enough to know that your wellness and the way you feel matters."Connect with Dr. Leah JohansenWebsiteFull Interview TranscriptConnect with AGEISTNewsletterInstagramWebsiteBackground Cover Photo by Katerina May on UnsplashSay hi to the AGEIST team!

Oct 17, 2024 • 55min
Dr. Linda Eller’s Guide to Stress-Free Wellness
Practical, sustainable steps for fostering health and resilience in the midst of life’s everyday challenges with Dr. Linda Eller, D.O. Through her unique perspective, Dr. Eller explains how small, mindful changes can create a foundation for long-term wellness and reduced stress. She addresses common pitfalls in modern health practices, guiding listeners on how to establish a truly balanced lifestyle. Tune in to understand how proactive awareness can improve your overall well-being and help you build a healthier future.What kind of SuperAger are you? Take our quiz today and find out! Visit: ageist.com/quizThanks To Our SponsorsManukora Honey – Support your immunity, digestive health, and vitality with the highest grade Manuka honey from Manukora–full of antioxidants, bioactive prebiotics, and antibacterial properties. Use code AGEIST for $25 off your Starter Kit at manukora.com/ageistOneSkin – Scientifically proven to reduce skin age, OS-1 is our number one wrinkle-fighting topical product. Use code: SUPERAGE15 at oneskin.co/superage to save 15% on your first purchaseLMNT Electrolytes — our favorite electrolytes for optimal hydration. Listeners receive a free 8-serving sample pack with their purchase at DrinkLMNT.com/AGEIST. Key Quotes:“Small changes in our routines can have a big impact on our well-being over time.”“Health isn’t about perfection; it’s about finding balance and consistency in everyday choices."“Learning to manage stress effectively is the cornerstone of lasting health.”Connect with Dr. Linda EllerWebsiteFull Interview TranscriptConnect with AGEISTNewsletterInstagramWebsiteSay hi to the AGEIST team!

Oct 10, 2024 • 56min
Dr. Jen Wagner: Navigating Menopause and Longevity
Join us for a new take on menopause, hormone therapy, and more with Dr. Jen Wagner, a seasoned physician and advocate for women's health. Dr. Wagner discusses how the conversation around hormone therapy has evolved, and why it's crucial for women to understand their options in managing symptoms like hot flashes, muscle loss, and declining bone density. She also shares insights into why only a small percentage of women today use hormone therapy and dispels common myths that keep women from seeking treatment. Tune in to learn how understanding your hormone health could significantly improve your quality of life.What kind of SuperAger are you? Take our quiz today and find out! Visit: ageist.com/quizThanks To Our SponsorsMomentous Supplements – Committed to the best in human performance, Momentous converts gold-standard scientific testing into real world impact via the highest quality health and sport supplements. Use code AGEIST at checkout to save 20% off your first order or visit www.livemomentous.com/ageistDIVI – take back control of your hair and scalp health, and do it with Divi's clean, science-backed ingredients. Listeners get 20% off your first Divi order at diviofficial.com/AGEIST or enter code "AGEIST" at checkout. Manukora Honey – Support your immunity, digestive health, and vitality with the highest grade Manuka honey from Manukora–full of antioxidants, bioactive prebiotics, and antibacterial properties. Use code AGEIST for $25 off your Starter Kit at manukora.com/ageistKey Quotes:"If this were happening to men, we’d have solved the problem already.""Estrogen isn't just about menopause; it impacts every organ system in your body.""There’s no badge of honor in suffering through menopause symptoms."Connect with Dr. Jen WagnerWebsite: We ProsperInstagram: we.are.prosperLinkedIn: ProsperFull Interview TranscriptConnect with AGEISTNewsletterInstagramWebsiteSay hi to the AGEIST team!

Oct 3, 2024 • 50min
Ashley Selman: Muscle and Strength After 50
Want to build muscle and avoid injury at all costs? Blood flow restriction (BFR) training is a powerful, yet low-impact method that helps build strength, muscle, and bone density without the risks associated with heavy lifting. Professional trainer and former athlete Ashley Selman joins us to explain how this tool is especially beneficial for women over 40, helping to combat muscle loss and maintain independence. She dives into real-world examples, including how BFR helped her regain strength after hip surgery, and why it's quickly becoming her go-to training tool for clients. Listeners will gain practical strategies for incorporating BFR into their routines to achieve better results with less stress on the body.What kind of SuperAger are you? Take our quiz today and find out! Visit: ageist.com/quizThanks to our sponsors:LMNT Electrolytes — our favorite electrolytes for optimal hydration. Listeners receive a free 8-serving sample pack with their purchase at DrinkLMNT.com/AGEIST. Our Place – our favorite cookware brand for non-toxic, PFA-free pots and brands. Use code “AGEIST” for 10% off at fromourplace.comDIVI – take back control of your hair and scalp health, and do it with Divi's clean, science-backed ingredients. Listeners get 20% off your first Divi order at diviofficial.com/AGEIST or enter code "AGEIST" at checkout.Key Moments:"Blood flow restriction training helps you build muscle, boost growth hormone, and stay strong without trashing your joints.""I tell my clients, BFR is the closest thing to a miracle tool for fitness, especially for aging bodies.""In just four months, one client who struggled to lose weight for years lost 22 pounds using BFR."Connect with our Ashley Selman:BFR ProgramsAshley’s GymFitness Business CoachingInstagramFull Interview TranscriptConnect with AGEISTNewsletterInstagramWebsiteSay hi to the AGEIST team!

Sep 26, 2024 • 54min
Dr. Stacy Sims: The Workout Mistake Women Make
Do you know the crucial differences in how women and men should approach fitness and aging? This week, women’s health expert Dr. Stacy Sims breaks down the impact of hormonal changes, explaining why women 40+ need to shift their workout routines to see real results. The keys here are high-intensity training and strength-building for women’s long-term health. Dr. Sims explains how to tailor exercises to avoid common mistakes and shares practical strategies to optimize your fitness, no matter your age or stage in life.Thanks to our sponsors:OneSkin – Scientifically proven to reduce skin age, OS-1 is our number one wrinkle-fighting topical product. Use code: SUPERAGE15 at oneskin.co/superage to save 15% on your first purchaseManukora Honey – Support your immunity, digestive health, and vitality with the highest grade Manuka honey from Manukora–full of antioxidants, bioactive prebiotics, and antibacterial properties. Use code AGEIST for $25 off your Starter Kit at manukora.com/ageistOur Place – our favorite cookware brand for non-toxic, PFA-free pots and brands. Use code “AGEIST” for 10% off at fromourplace.com Key Quotes:"Women don't age in a linear fashion like men do. Hormonal changes hit much earlier and more dramatically.""For women over 40, lifting heavy isn't optional—it’s essential for maintaining lean mass and bone density.""Women are already metabolically flexible. High-intensity is where the real gains are."Connect with Dr. Stacy SimsWebsiteInstagramStacy’s book: RoarTED TalkFull Interview TranscriptConnect with AGEISTNewsletterInstagramWebsiteSay hi to the AGEIST team!