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: instagram.com/drdavidlipman

1% Better Podcast Instagram: instagram.com/onepercentbetterpod/|

1% Better Podcast on Spotify: open.spotify.com/show/4bG2U3dciEduX8c3PUtkrQ
Matt Fox Links:

Instagram: instagram.com/mattinglisfox

Coaching: sweatelitecoaching.com

Supporters Club: sweatelite.co/supporters

YouTube: 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
01:17:28 GLP-1s and Doping Rules
01:22:39 Peptides Gray Market Risks
01:23:44 Amateur Standards and Fairness
01:26:28 Super Shoes and Gray Areas
01:33:22 Wrapping Up and Podcast Plug