Which Supplements Should Marathoners Be Taking? - Dr David Lipman

Sports medicine physician,endurance athlete and 1% Better Podcast host  - Dave Lipman - checks in for a wide-ranging conversation covering the realities of podcasting, the future of endurance technology, recovery methods, supplements, sleep tracking, heat adaptation, longevity trends, GLP-1s, peptides, and where the line should be drawn between performance enhancement and fair competition. Dave Lipman Links: Instagram: https://www.instagram.com/drdavidlipman/ 1% Better Podcast Instagram: https://www.instagram.com/onepercentbetterpod/| 1% Better Podcast on Spotify: https://open.spotify.com/show/4bG2U3dciEduX8c3PUtkrQ Matt Fox Links: Instagram: https://www.instagram.com/mattinglisfox/ Coaching: https://www.sweatelitecoaching.com/ Supporters Club: https://www.sweatelite.co/supporters YouTube: https://www.youtube.com/@SweatElite Matt welcomes Dave back to the podcast and the pair begin by discussing the realities of producing endurance content. They talk about the challenges of scheduling guests, dealing with cancellations and technical issues, recording in person versus remotely, and why some of the best conversations happen when the host and guest don't know each other particularly well beforehand. Dave also shares his podcast inspirations, what he currently listens to, and the endurance personalities he would most like to interview. The conversation then shifts toward the future of endurance performance technology. Dave discusses continuous lactate monitoring, multi-analyte sensors capable of tracking biomarkers such as glucose, ketones, cortisol, and hormones, as well as emerging ventilation and respiratory wearables. They explore whether future devices will be able to separate metabolic stress from mechanical and neuromuscular load, creating more useful insights than current metrics alone. Matt and Dave discuss the balance between useful data and over-analysis, touching on sleep tracking, orthosomnia, and how athletes can become overly reliant on wearable feedback. Dave explains why subjective feel still matters and why training should ultimately enhance enjoyment rather than create more stress. The discussion moves into supplements, with Dave outlining his practical framework for evaluating evidence and deciding what is worth using. They cover bicarbonate products such as Maurten Bicarb and Nomio, creatine, beta-alanine, beet nitrates, taurine, and the supplement trends currently gaining traction in endurance sport. Recovery strategies are another major focus. Dave reviews the evidence surrounding ice baths, sauna use, heat adaptation, active versus passive heat exposure, and how timing these interventions incorrectly may blunt training adaptations. They also discuss sweat rate adaptations, the interaction between heat and altitude training, and examples of accidental training breakthroughs that emerged from environmental stress. The final section of the conversation examines the rapidly growing longevity and biohacking space. Matt and Dave discuss Bryan Johnson, GLP-1 medications, peptides, anti-aging interventions, anti-doping gray areas, and whether amateur athletes should be held to different standards than professionals. The discussion expands into super shoes, emerging performance technologies, and how the sport may need to adapt as new forms of enhancement become increasingly accessible. Episode Chapters 00:00 Welcome Back Dave 01:01 Podcasting Struggles 02:59 Remote vs In Person 05:06 Editing Norwegian Method 06:56 Podcast Inspirations 07:58 What We Listen To 12:26 Dream Guests List 13:51 Better Interview Flow 16:43 Future Endurance Tech 19:53 Continuous Biomarkers 21:55 Mechanical Load Insights 27:06 Cortisol and Lactate Nuances 31:24 Lactate Compartments 32:56 Tech and Overthinking 36:06 Train for Enjoyment 36:44 Sleep Tracking Pitfalls 40:13 Supplements Framework 47:21 Creatine, Beta-Alanine, and Beets 53:44 Taurine and Trends 56:31 Ice Baths Net Effect 01:02:37 Sauna Heat Adaptation 01:05:52 Heat Training Benefits 01:06:28 Sweat Rate Tradeoffs 01:07:30 Active vs Passive Heat 01:08:38 Heat Plus Altitude Synergy 01:09:15 Accidental Breakthrough Block 01:12:05 Longevity and Bryan Johnson 01:13:15 Complex Systems and Lifestyle 01: