Supplements for Longevity & Their Efficacy | Dr. Peter Attia

Episode Summary

Executive Summary: Andrew Huberman and Peter Attia dissect the NAD pathway, arguing that while NAD biology is central to energy metabolism and DNA repair, the leap from raising NAD to extending lifespan is unproven. They contrast NAD supplements/infusions (NR, NMN, NAD) with stronger longevity evidence for exercise, sleep, nutrition, and rapamycin, concluding NAD-boosting is at best speculative for lifespan and not a priority intervention.

Main Topics: Framework for longevity interventions (Priority: 5/5): Attia organizes longevity strategies into behaviors, disease-targeting drugs, aging-pathway drugs, and maximalist 'do everything' approaches, emphasizing that lifestyle and disease prevention dominate. Rapamycin as the strongest geroprotective candidate (Priority: 5/5): Rapamycin is presented as the most convincing aging-targeting drug because it repeatedly extends lifespan across model organisms and has some human immune-modulation data. NAD biology and the sirtuin hypothesis (Priority: 5/5): The discussion explains NAD/NADH as central to energy transfer and DNA repair, and reviews the historical sirtuin story that linked caloric restriction, resveratrol, and longevity. Why NR, NMN, and NAD infusions are viewed skeptically (Priority: 5/5): The speakers argue that increasing NAD levels does not necessarily fix aging-related decline, and that evidence for lifespan benefit in humans is weak or absent. Human and animal evidence for NAD precursors (Priority: 4/5): They review limited human studies and the ITP data, noting mostly null or clinically trivial findings for NR/NMN, with one possible skin-cancer signal needing replication. Biological age testing and measurement skepticism (Priority: 3/5): Attia questions the precision and usefulness of biological age clocks, arguing they are noisy and less meaningful than actual health behaviors and outcomes. Supplement regimens and practical priorities (Priority: 4/5): Both speakers list their own supplements, but repeatedly stress that supplements are minor compared with exercise, sleep, nutrition, and emotional health.

Key Arguments: Longevity is best approached by delaying chronic disease onset, not by chasing isolated biomarkers or supplements. Exercise, sleep, nutrition, and emotional health are the main determinants of healthspan and lifespan; supplements are secondary. Rapamycin has unusually strong cross-species lifespan data, unlike NAD-boosting strategies. The original sirtuin/caloric restriction narrative is not supported as a shared pathway; they appear to be parallel, not identical, mechanisms. NAD is essential for metabolism and DNA repair, but age-related changes may reflect altered redox state and mitochondrial function more than a simple NAD deficiency. Raising blood NAD does not prove increased intracellular NAD in relevant tissues, nor does it prove lifespan benefit. NR and NMN may be safe and may have niche benefits, but current evidence does not justify them as longevity interventions. The strongest possible case for NR/NMN may be a reduction in basal and squamous cell skin cancers, but this finding needs replication. Biological age tests are noisy and should not be overinterpreted; directionality matters more than exact numbers. Behavioral interventions are the 'heading of the Titanic'; supplements are only the 'lobster or steak' on board.

Data Points: Rapamycin dose: 8 mg once weekly - Attia’s personal regimen, taken in cycles because of mouth sores Rapamycin side effect frequency: ~10% of people - Attia says aphthous ulcers/canker sores occur in about one in ten users Rapamycin use pattern: ~2 months on, ~1 month off - Attia cycles off due to mouth sores NAD decline in skin: ~60% reduction over lifetime - Attia cites skin as the tissue with the largest age-related NAD drop NAD decline in blood: ~20% reduction - Whole-blood NAD decreases across aging in humans Brain NAD decline: ~15% to 20% reduction - Animal data discussed for brain tissue NADH change in blood: ~10% to 20% increase over four decades - A 2015 PNAS study suggested NADH rises as NAD falls Resveratrol study dose context: Very high / mega doses - The famous mouse study used extreme dosing and a fatty-liver model SIRT6 transgenic mouse lifespan: 10% to 15% longer in males - One mouse study showed lifespan extension with SIRT6 overexpression Clotho overexpression lifespan: 15% to 20% longer - Referenced as an example of a validated longevity gene in mice NR trial outcome in ITP: No lifespan or healthspan benefit - Interventions Testing Program found no effect even at high doses Canagliflozin in ITP: Extended lifespan - Used as an example of a successful geroprotective drug in mice Acarbose in ITP: Extended lifespan - Worked without requiring weight loss 17-alpha-estradiol effect: Worked only in male mice - Example of sex-specific longevity effects Human fatty liver trial: No primary outcome difference - NR/terastilbene study showed no overall change in liver fat or biomarkers Subgroup liver-fat finding: 20% to 15% liver fat - A narrow subgroup analysis showed a statistically significant but clinically modest reduction NMN glucose disposal study: Small statistically significant increase - Insulin-stimulated glucose disposal improved modestly, but clinical significance was minimal Skin cancer signal: ~60% to 80% reduction - One study suggested fewer basal and squamous cell carcinomas with NR/NMN-like supplementation Vitamin D dose: 5,000 IU/day - Attia’s personal supplement regimen Creatine dose: 5 g/day - Huberman’s routine supplement use EPA target: >1 g/day - Huberman aims for at least one gram of EPA from fish oil Magnesium forms: 3 forms - Attia says he takes magnesium in three formulations NRC annual radiation limit: <50 mSv/year - Used to contextualize airport scanners and flight exposure Sea-level background radiation: ~1 mSv/year - Baseline exposure cited in the radiation discussion

Pivotal Quotes: "Everything we have talked about on this podcast today... all of that stuff, while potentially mattering, I would put in the category of, was the Titanic serving lobster or steak?" — Peter Atiyah: He contrasts supplements with the much larger importance of lifestyle and emotional health "I passionately do not believe they do anything for me." — Peter Atiyah: His stance on NR/NMN supplementation and longevity benefit "The critical four are exercise, sleep, nutrition, and emotional health." — Andrew Huberman: Both speakers agree these are the main determinants of healthspan and lifespan

Implications: Listeners should treat NAD boosters as speculative and secondary. The practical takeaway is to prioritize exercise, sleep, nutrition, and mental health; use supplements cautiously; and view rapamycin and other drugs as more evidence-based than NR/NMN for longevity.