
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

Jul 19, 2023 • 1h 15min
60 is My Power Decade: Julia Linn on Aging and Wellness
Is it ever too late to meet your personal health goals? It took positivity and determination for athlete and women’s empowerment coach Julia Linn, otherwise known as @dolphinine to overcome diabetes, a double organ transplant, and cardiac bypass surgery. In fact, since she embarked on her fitness journey at age 62, she has found great power and joy in taking full authorship over her health. This week, we peel back the layers of wellness, and dive deep into mindset. My conversation with Julia explores her experiences with the toxic cultures of diet exercise sectors, the peril of fast fixes, and the value of steady, measured progress, and self-care. We hear personal stories on how menopause led her to experiment with varied foods and eventually find the balance that works best for her body. This further demonstrates the importance of self-responsibility in health and nutrition choices. Join us as we navigate personal growth, health journeys, and fitness–drawing inspiration from others to lead healthier, happier, and longer lives! And for those wondering, the answer is "no it is never too late to meet your health goals!"Be sure to check out Julia’s new book: My Power Decade: A Story of Mindset, Weight Loss, Muscle Gain, and Reclaiming Health After Age SixtyKey Moments"So I'm 63. I'm on a stage in a bikini, and I actually won, and it just sort of started this whole experience for me of knowing what my body could do. And, more importantly, let women know who are 50 plus, struggling with menopause, struggling with self-esteem, struggling with their body issues., to see me: a double organ transplant, triple cardiac bypass, no thyroid, to see me like strong and muscular at 66, 65. They suddenly think: she gives me hope, she can do it. I can do it To me, that is the biggest gift I can give out of all my experiences to let other women know this is possible. Don't limit yourself. ""Low calorie, high cardio is not sustainable, and I feel like that industry has said okay, here's another quick fix. How about a shot? How about you take a shot and it makes you so sick that you don't want to eat food and you lose weight? How about that? First of all, it doesn't deal with mindset issues, which are vital.""Be patient, go slow, listen to your body. Everybody's different. If you want to do keto, do keto. If you want to do macros, do macros. If you want to do portion control, do that. Everybody's different, but it has to be a common sense approach. Day in and day out, positive, repetitive action that shows you honor your body, you love your body. It can't come out of 'I hate my body, I'm disgusted.'"SponsorsInsideTracker — the dashboard to your Inner Health. Listeners get 10% off on all products at InsideTracker.com/AGEIST.Timeline Nutrition — our favorite supplement for cell support and mitochondrial function. Listeners receive 10% off your first order of Mitopure with code AGEIST at TimelineNutrition.com/ageist. LMNT Electrolytes — our favorite electrolytes for optimal hydration. Listeners receive a free 8-serving sample pack with their purchase at DrinkLMNT.com/AGEIST. Connect with Julia LinnWebsiteInstagramFacebook Say hi to the AGEIST team!

Jul 11, 2023 • 31min
Rethinking Fitness: The Overlooked Significance of Stability and Balance
Rethinking Fitness: The Overlooked Significance of Stability and BalanceStaying useful for as long as we can, brain training our central nervous system to improve our balance, demystifying PT, the difference between stability and balance, and more. In today's show, I'm here to share my personal experiences surrounding stability and balance - two aspects that are often overlooked. This episode is all about the journey; from me hopping on one foot to enhance balance, to exploring physical therapy and sports for more robust body stability, to learning how this fosters longer, better, and healthier lives for all of us. It's about harnessing the power of movement and control.As we age, the risk of injuries from falls increases alarmingly, making stability and balance crucial for our overall health. This episode sheds light on these important elements of fitness and emphasizes how their role goes beyond the traditional gym routine.Thank you to our sponsors: InsideTracker — the dashboard to your Inner Health. Listeners get 10% off on all products at InsideTracker.com/AGEIST.SRW Labs – Science Research Wellness — improve your cellular health. Listeners receive 20% off all products with code AGEIST20 at SRW.co. LMNT Electrolytes — our favorite electrolytes for optimal hydration. Listeners receive a free 8-serving sample pack with their purchase at DrinkLMNT.com/AGEIST. Quotes“If we feel confident in our bodies, if we feel certain that we are stable, doing whatever we're doing, we're going to be able to be more useful.”“Doing things like playing tennis, playing pickleball, all of these things require an element of stability, and one of the things to keep in mind is that a lot of our physical faculties are going to decay pretty much no matter what we do. So we need to keep them at the peak level for as long as we can.”“Then we have balance, and balance is a critical part of stability, but it's not the same thing as stability.”Listen to the SuperAge podcast wherever you get your pods.Connect with David StewartWebsiteInstagramFacebook LinkedInEmailVisit ageist.com for a full transcription Say hi to the AGEIST team!

Jul 6, 2023 • 58min
The Sleep Doctor’s Guide to a Restful Life: Dr. Michael Breus
Dr. Michael Breus, the internationally renowned “Sleep Doctor” joins us to discuss achieving optimal sleep, the side effects of poor sleep habits, and how little changes can often be the first dominoes that lead to life-changing improvement. Thank you to our sponsors: Timeline Nutrition — our favorite supplement for cell support and mitochondrial function. Listeners receive 10% off your first order of Mitopure with code AGEIST at TimelineNutrition.com/ageist. Ned Mellö Magnesium — essential supplement to improve sleep, reduce stress, increase energy, and more. Use code “AGEIST” for 15% off at helloned.com/AGEISTInsideTracker — the dashboard to your Inner Health. Listeners get 10% off on all products at InsideTracker.com/AGEIST.Synopsis:Ever wondered why your sleep quality fluctuates or why you're wide awake when others are deep in their dreams? Not all questions about sleep are as simple as: "night owl or early bird?" In this empowering episode, we sat down with Dr. Michael Breus, the Sleep Doctor himself, to shed light on the complex world of sleep. We explored how our sleep is affected by continuous sunlight, the role of glucose monitors, and much more. Diving deeper. Dr. Breus explains how our core body temperature and melatonin intertwine and offers valuable advice on how to optimize your environment for better sleep. We explored the fascinating realm of sleep chronotypes, debunking the misconceptions and revealing what it means to be a bear, wolf, or dolphin sleeper. We also discussed how to stay cool at night without becoming dependent on AC. Finally, we turned our attention to the serious topic of sleep apnea and unraveled its prevalence, risk factors and treatment options including CPAP, Inspire, and Excite. We wrapped up the conversation discussing how physical activity, from pickleball to swimming, can improve your overall health, sleep, and longevity. Join us to better understand and improve your sleep.Key Moments“Memory Foam sleeps hot.”“You don’t have to run a marathon, but you do have to get off of the couch.”“With patients who had mild symptoms of age-related memory loss, once we got their apnea fixed, what we thought was dementia and Alzheimer's literally disappeared because they were breathing and getting into these deeper stages of sleep.”Connect with Dr. Breus:WebsiteSleep QuizInstagramFacebook LinkedInSay hi to the AGEIST team!

Jun 29, 2023 • 58min
The Journey to Brain Health, An Athlete’s Guide to Post-Career Wellness: Jeff Byers
What is the importance of recovery for overall health? Why do we have to be extra diligent and consistent with our health as we age? What are sub-concussive events? What are the benefits of creatine for brain health? What do we need to know about taking omega-3s? Thank you to our sponsors:InsideTracker — the dashboard to your Inner Health. Listeners get 10% off on all products at InsideTracker.com/AGEIST.Timeline Nutrition — our favorite supplement for cell support and mitochondrial function. Listeners receive 10% off your first order of Mitopure with code AGEIST at TimelineNutrition.com/ageist. LMNT Electrolytes — our favorite electrolytes for optimal hydration. Listeners receive a free 8-serving sample pack with their purchase at DrinkLMNT.com/AGEIST. Jeff Byers, co-founder and CEO of Momentous and former NFL lineman, discusses his NFL career, his approach to physical and cognitive recovery, brain health, creatine and omega-3 supplementation, and more. “Everything you do has a purpose and a reason and if it doesn’t relate back to what you are really trying to accomplish, it’s noise and therefore you exit out of it.” “As an athlete, you’re willing to sacrifice a lot to be great and you make decisions that are not good for you in the long term to be great at something.” “Being an offensive lineman is not good for cognitive health… but for that period of time, it’s what I chose to do.” Listen to the SuperAge podcast wherever you get your pods. Connect with Jeff:LinkedInSay hi to the AGEIST team!

Jun 22, 2023 • 1h 11min
Improving Circulation, Hormonal Function, and Metabolic Responses: Steven Munatones
Why must we focus on maintaining muscle mass into later years? What is blood flow restriction training? What is vascular tissue? How does vascular tissue interact with muscle building? How does Kaatsu improve circulation and vascularity? How can older individuals benefit from products like Kaatsu? Thank you to our sponsors:InsideTracker — the dashboard to your Inner Health. Listeners get 10% off on all products at InsideTracker.com/AGEIST.Timeline Nutrition — our favorite supplement for cell support and mitochondrial function. Listeners receive 10% off your first order of Mitopure with code AGEIST at TimelineNutrition.com/ageist. LMNT Electrolytes — our favorite electrolytes for optimal hydration. Listeners receive a free 8-serving sample pack with their purchase at DrinkLMNT.com/AGEIST. Steven Munatones is the co-founder and CEO of Kaatsu. Steven has started several companies and with his company, Kaatsu, he is currently enabling people from wounded warriors and paraplegics to Olympic and professional athletes to rehabilitate more quickly, effectively and conveniently, and to enable older, sedentary individuals improve their blood circulation and muscle tone. “We use these bands as a catalyst to create an engorgement of blood in the limbs and that is the kickstarter to a variety of hormonal and metabolic responses in the body.”“Our oldest user is 104 years old, we have another user who is 95. They just want to continue a quality of life, they want to be able to open up a jar, they want to be able to wash their hair easily, and they want to sweep around their house. Just to handle these things they need to maintain their muscle mass.” “With older people, it’s also a very critical thing that we are standing, sitting, standing, sitting, standing, sitting to teach them that when you might trip, the last thing we want is for them to fall and break a bone. If they can catch themselves, maybe they don’t break their bone. Maybe they catch themselves and they’re able to not have to go to the ER.” Listen to the SuperAge podcast wherever you get your pods. Connect with Steven:LinkedInKaatsu — Use code “SuperAge5” for a 5% discount off Kaatsu.Say hi to the AGEIST team!

Jun 15, 2023 • 60min
Omega-3s for Your Brain and the Planet: Isaac Berzin, PhD
We need omega-3s, but what is the bioavailability difference between algae-based omega-3s and fish oil? What are EPA and DHA? What is the connection between omega-3s and mood? How is algae more sustainable than fish oil?Thank you to our sponsors:InsideTracker — the dashboard to your Inner Health. Listeners get 10% off on all products atInsideTracker.com/AGEIST.Ned Mellö Magnesium — essential supplement to improve sleep, reduce stress, increase energy, and more. Use code “AGEIST” for 15% off at helloned.com/AGEISTIsaac Berzin is a scientist and entrepreneur in the field of sustainable microalgae. He currently serves as the founder and CTO of Vaxa — developing sustainable algae-based feed and food ingredients. The company's production facility is located in Iceland, integrated with one of the world's largest geothermal power production facilities.Isaac joins us to discuss everything we need to know about algae, the issues with fish oil, sustainability, and what is next for his company, Vaxa. “If you look at the composition of fish oil today, it’s not a clean source.” “You can consume ⅓ of algae omega-3s, compared to fish oil, and still get the same benefit.” “The human body reacts to your diet; it’s not going to produce the same model enzymes if you have this kind of meal or that kind of meal.” “I don’t believe that if you’re doing the right thing, you have to suffer.” “Do you know any plant that has 70% protein? Even meat I don’t think has 70% protein. So, algae is a super, superfood.” Listen to the SuperAge podcast wherever you get your pods. Connect with Isaac:VaxaLinkedInOrlo Nutrition Omega-3sOmega-3 Index Test KitSay hi to the AGEIST team!

Jun 8, 2023 • 1h 10min
A Preventative Approach to Aging: Dr. Jennifer Wagner
Dr. Jennifer Wagner is trained as a pediatric anesthesiologist and spent most of her career at Stanford. Then, 2 years ago, she made the decision to shift and leave clinical practice and move to the mountains with her family, and became the Chief Medical Officer at Liminal Collective. Thank you 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. InsideTracker — the dashboard to your Inner Health. Listeners get 10% off on all products at InsideTracker.com/AGEIST.Science Research Wellness — improve your cellular health. Listeners receive 20% off all products with code AGEIST20 at SRW.co. Dr. Wagner discusses how she is taking a 40-year preventative approach to her aging, the poor quality of life of a doctor, why she stepped back from that lifestyle, Liminal Collective, how she is teaching women to optimize their lives through her new project “Prosper,” performance, and more. “I used to drive home from Stanford and sit in my garage and cry before I went in to take care of my two kids under 4. I was so stressed from work and then walk in and have to be a mom in a split second after working a 12-hour day.”“The pandemic really took a toll on women, having to balance careers and kids at home, so there was a huge exit of women out of the workplace that still hasn’t recovered.” “Is everything optimal? Is waiting until I have a significant risk factor, is that really the right time to start prevention? To me, I said no.”“I am super fortunate my parents are still alive but I’ve watched them age and I would prefer to age differently. They’re doing okay but they’re not the way I want to be at 78. That really sparked looking into how I can optimize myself now so that every ten years my risk factors stay zero.” “Keeping people out of the hospital, keeping people healthy, and keeping people off medication is not financially lucrative for a lot of industries which is unfortunate but it’s the bottom line.” “We get so busy. You can spend your entire day from the moment you wake up to the moment you go to bed trying to live a longer life but there also can just be moments of joy, slowing down, looking up. We get in such a hurry all the time but smiling, saying hello to someone on a trail, and appreciating what’s around us has significant health benefits.” Listen to the SuperAge podcast wherever you get your pods.Connect with Dr. Jennifer Wagner:LinkedInLiminal Collectivejen@weprosper.coSay hi to the AGEIST team!

Jun 1, 2023 • 53min
The Art of Living Meets Longevity Science: Dr. Kien Vuu
What is the default mode network? How does breathwork impact our thinking? What is the power of acts of kindness? What is the art of living? How do we find our purpose? Thank you to our sponsors: Timeline Nutrition — our favorite supplement for cell support and mitochondrial function. Listeners receive 10% off your first order of Mitopure with code AGEIST at TimelineNutrition.com/ageist. LMNT Electrolytes — our favorite electrolytes for optimal hydration. Listeners receive a free 8-serving sample pack with their purchase at DrinkLMNT.com/AGEIST. InsideTracker — the dashboard to your Inner Health. Listeners get 10% off on all products at InsideTracker.com/AGEIST.Dr. Kien Vuu, concierge performance and longevity physician specializing in human optimization and regenerative medicine, media expert, and author, joins us on the SuperAge podcast to discuss the default mode network, how to live well beyond the science of longevity, finding your purpose, and more. “It’s so important to be aware of the things that trigger us because it might be coming from our past. If we’re not aware of that program that’s running below the surface, we’re going to be making choices from the unconscious conditioned autopilot mode of the brain.” “The energy of love, of healing, of laughter can spread across a community just as fast as fear, resentment, hate, so energy can ripple across.” “How we treat each other, how we treat strangers, that is actually medicine as well and just as powerful.” “How we choose to show up in every single moment of our life is medicine. That’s the art of living.” “We come into this world with this authentic love vibration of just who we are as kids, that’s who we are authentically, so the things that naturally bring joy to us, the things that light us up, the things that make us feel good, those things are programmed in our DNA. Purpose is really just us to exist as us.” Listen to the SuperAge podcast wherever you get your pods.Connect with Dr. Kien Vuu:WebsiteInstagramFacebookLinkedInThrive State Book 2nd EditionSay hi to the AGEIST team!

May 25, 2023 • 1h 11min
The Religious Take On Longevity: Clayton Crawley
Should we feel guilty about enjoying life when there is suffering in the world? How does prayer work? How can we be useful to others? Should we enjoy abundance? What is the importance of relationships for our health? How much self-care is appropriate? Thank you to our sponsors: Science Research Wellness — improve your cellular health. Listeners receive 20% off all products with code AGEIST20 at SRW.co. InsideTracker — the dashboard to your Inner Health. Listeners get 10% off on all products at InsideTracker.com/AGEIST.LMNT Electrolytes — our favorite electrolytes for optimal hydration. Listeners receive a free 8-serving sample pack with their purchase at DrinkLMNT.com/AGEIST. Clayton Crawley, Episcopal priest and EVP, Chief Church Relations Officer at The Church Pension Group joins us to discuss his religious beliefs, how to enjoy life while understanding suffering, how to be useful, longevity, and more. “Part of being a joyful person is to understand that being selfish is actually a path to misery. You can enjoy the best things in life but it’s when you take that enjoyment and hold it tightly, you are committing what in Christianity we would call a sin. You’re being selfish.” “If you give your life away, you will actually save it.” “You can be selfish and have all the money and all the health that you need but you will die because that’s not what it’s about. It is about giving to others, being generous, being joyful. The people that are the most joyful, in my experience, are those who have the most connections.” “What keeps your brain healthy and what makes you happy long-term is having relationships with other people.” “I believe that we are called to live well as long as we live.”“It’s really a gift to be in relationship with other people.” Listen to the SuperAge podcast wherever you get your pods. Connect with Clayton:LinkedInChurch Pension GroupSay hi to the AGEIST team!

May 18, 2023 • 60min
Age, Metabolic Health, and Glucose: Kara Collier
What is metabolic health? What is glucose? What is a continuous glucose monitor? How does stress impact our glucose levels and spikes? Why should we eat protein before carbs? How does time of day impact our metabolism? How does caffeine impact glucose levels? Thank you 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. InsideTracker — the dashboard to your Inner Health. Listeners get 10% off on all products atInsideTracker.com/AGEIST.Timeline Nutrition — our favorite supplement for cell support and mitochondrial function. Listeners receive 10% off your first order of Mitopure with code AGEIST at TimelineNutrition.com/ageist. Kara Collier is the co-founder and VP of Health at Nutrisense, one of America’s fastest-growing wellness-tech startups, where she leads the health team. Kara is a Registered Dietitian Nutritionist (RDN), Licensed Dietitian/Nutritionist (LDN), and Certified Nutrition Support Clinician (CNSC) specializing in glucose control and metabolism.Kara joins us to discuss metabolic health, glucose as we age, how stress impacts our glucose spikes, the importance of protein, and more. “Typically what you see in the ICUs actually are complications from lifestyle-related chronic conditions. Something like needing an urgent leg amputation because of uncontrolled diabetes or needing to be put on dialysis because of uncontrolled cardiovascular disease. These were the types of instances I was seeing over and over and that experience led to some frustrations wishing I could help people sooner so they never had to end up there in the first place.” “Just like a car has an engine that interacts with many different components of the car to run it, we have a similar cellular engine and that would be considered metabolic health as a whole.” “It’s not that we never have our glucose move, it’s just that we want to keep it in these healthy ranges and we don’t want to overload those places where glucose can go.” “If somebody is relatively healthy, their metabolic health looks good overall but their fasted glucose level is always high, typically the #1 thing that’s happening is chronic stress.” “With nutrition specifically, the framework we try to teach people is: master the basics, understand the fundamentals that everyone should be doing and then be malleable and empirical. Be willing to be flexible in your approach based off of your own personalized data because we all are unique.” “About the worst thing that you could do for your glucose levels is a liquid form of sugar.” Listen to the SuperAge podcast wherever you get your pods. Connect with Kara:InstagramLinkedInNutrisenseSay hi to the AGEIST team!
Remember Everything You Learn from Podcasts
Save insights instantly, chat with episodes, and build lasting knowledge - all powered by AI.