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.
AGEIST
Dr. Marc Bubbs: Performance Nutrition for Everyday Life
Are you eating the right way for your goals? Performance nutritionist Dr. Marc Bubbs has spent 20 years working with Olympic athletes, elite sports teams, and executives to optimize their health through diet and lifestyle. In this episode, he explains how nutrition isn’t one-size-fits-all, why carbs aren’t the enemy, and how small changes in your daily habits can have massive long-term impacts. Whether you’re a competitive athlete or just want to feel better, Dr. Marc breaks down the science behind what actually works—without the fads and misinformation that flood social media.
Interested in trying ProBio Nutrition? Click here, to apply discount code AGEIST20 at checkout and save 20% on your order.
How long will you live? Take our quiz today to find out! Visit ageist.com/longevityquiz
Chapters
(04:12) Understanding Performance Nutrition
(10:09) Fueling Different Types of Athletes
(16:20) Nutrition for the General Population
(22:11) Protein Intake and Its Importance
(28:17) Building a Nutritional Foundation
(32:46) Reframing Food Mindset for Weight Management
(35:09) Understanding Carbohydrates and Blood Sugar Control
(39:09) The Evolving Perspective on Fats
(47:11) The Role of Collagen and Vitamin C in Nutrition
(50:04) Performance Nutrition: A Holistic Approach
Thanks to Our Sponsors
Troscriptions — Precision, pharmaceutical-grade nootropics for peak performance. Whether you need laser focus, mental clarity, or a boost in cognitive endurance, Troscriptions delivers science-backed results. Use code: AGEIST for 10% off, or click here.
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 number one electrolytes for optimal hydration. Listeners receive a free 8-serving sample pack with their purchase at DrinkLMNT.com/AGEIST.
Key Moments
“We want you to enjoy life and food—if we do well Monday to Friday, you can live a little on the weekends.”
“If you wake up exhausted, lean on caffeine, and make bad food choices all day, the problem isn’t willpower—it’s how you set up your mornings and nights.”
“Most people think performance nutrition is just for Olympians, but the same principles apply whether you're training for gold or just trying to keep up with your kids.”
Connect With Dr. Marc Bubbs
Website: drbubbs.com
Instagram: instagram.com/drbubbs
Books: Peak and Peak 40
Check out the full interview transcript