The Peter Attia Drive

Peter Attia, MD
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Expert insight on health, performance, longevity, critical thinking, and pursuing excellence. Dr. Peter Attia (Stanford/Hopkins/NIH-trained MD) talks with leaders in their fields.

  1. 9H AGO

    #387 - AMA #83: Peptides—evaluating the science, safety, and hype in a rapidly growing field

    View the Show Notes Page for This Episode Become a Member to Receive Exclusive Content Sign Up to Receive Peter's Weekly Newsletter In this "Ask Me Anything" (AMA) episode, Peter explores the topic of gray-market peptides, one of the most requested and most confusing topics he's covered on The Drive. Peptides sit at the intersection of biological plausibility, clinical promise, and aggressive commercialization, and are often marketed as cutting-edge therapies for everything from muscle repair and longevity to cosmetic enhancement. Rather than promoting or dismissing peptides wholesale, Peter lays out a clear, repeatable framework for evaluating any peptide or drug—covering mechanism, intended effects, safety, dosing, and alternatives. He distinguishes FDA-approved peptide therapeutics from the loosely regulated "peptides" common in biohacking culture; examines the strengths and limitations of animal and human evidence; unpacks manufacturing, gray-market sales, "research use only" labeling, and third-party testing; addresses oral peptides and absorption challenges; and explains how patents and incentives shape which compounds advance through clinical pipelines. The discussion concludes with a sober look at what would need to change for peptides to become broadly usable therapies, where legitimate peptide therapeutics may expand next, and which areas of medicine stand to benefit most right now. If you're not a subscriber and are listening on a podcast player, you'll only be able to hear a preview of the AMA. If you're a subscriber, you can now listen to this full episode on your private RSS feed or our website at the AMA #83 show notes page. If you are not a subscriber, you can learn more about the subscriber benefits here. We discuss: Setting the framework for evaluating peptides, and explaining the goal of this discussion [3:15]; What peptides are: basic definitions, biological roles, and therapeutic foundations [5:30]; A framework for evaluating peptides: mechanism, evidence, safety, and regulatory context [10:00]; Peptide case study—SS-31: mechanism of action, approved use in Barth syndrome, and other claimed effects [18:15]; Does the mechanistic rationale for SS-31 translate into measurable benefits? [22:15]; SS-31 continued: safety considerations, gray market risks, the balance of risk versus reward, and why it belongs in bucket #3 [26:00]; Peptide case study—melanotan-II: claimed effects, mechanism of action, safety, and side effects [30:45]; Melanotan-II continued: weighing the potential risks versus benefits and why it belongs in bucket #2 [36:30]; Peptide case study—CJC-1295: growth hormone–stimulating mechanism, claimed effects, and limited human data [40:15]; CJC-1295 continued: dosing uncertainty, risk-reward analysis, lack of long-term safety data, limited approved options, and why it belongs in bucket #2 [49:30]; Peptide case study—BPC 157: uncertain origins, broad claims, and weak mechanistic evidence [57:45]; BPC 157 continued: review of human evidence, lack of replication of animal data, safety considerations, risk-reward analysis, and why it belongs in bucket #1 [1:03:15]; Other popular "gray market" peptides and why they mostly fail when under scrutiny [1:11:15]; How the evidence on peptides compares to rapamycin, and why the lack of data is the biggest concern [1:20:00]; Understanding peptide regulation: FDA approval, supplement oversight, and the risks of gray-market compounds [1:23:00]; Inside the gray market: how peptides are sold, regulated, and why testing cannot guarantee safety [1:26:45]; Limitations of oral peptides, and examples of peptides in bucket #4 [1:31:45]; The future of peptides: real therapeutic potential versus hype in the wellness market [1:35:00]; and More. Connect With Peter on Twitter, Instagram, Facebook and YouTube

    22 min

  2. APR 6

    #386 - Aging clocks—what they measure, how they work, and their clinical and real-world relevance

    View the Show Notes Page for This Episode Become a Member to Receive Exclusive Content Sign Up to Receive Peter's Weekly Newsletter In this episode, Peter takes a deep dive into the science and application of aging clocks, unpacking what they are, the differences between chronological age, biological age, and the pace of aging, and what epigenetic clocks may actually be measuring. He explores key research in the field, including a randomized controlled trial that tested simple lifestyle interventions against several commonly used aging clocks, as well as a study using brain MRI to assess the pace of aging and its relationship to dementia risk and mortality. Throughout the episode, Peter highlights the promises and pitfalls of these tools, ultimately focusing on the field's central question: whether improving an aging clock score truly translates into meaningful clinical outcomes. We discuss: Why aging clocks are being used as proxies for long-term health outcomes and the uncertainty surrounding their clinical value [2:00]; How aging clocks use DNA methylation to predict age and how they compare to traditional mortality prediction models [5:00]; The shift from aging clocks that predict chronological age to newer models that aim to measure biological age, lifespan differences, and the pace of aging [11:45]; The limitations of second-generation aging clocks: biological and measurement noise affecting reliability and interpretation [14:45]; Why aging clocks are exciting tools—compression, speed, and individual feedback [17:15]; The DO-HEALTH randomized trial: the study design and how different aging clocks were used to measure biological age and the pace of aging [22:00]; The DO-HEALTH study results: findings, takeaways, and open questions [27:45]; The DunedinPACNI study: how the model was developed and what it may add to the field [35:00]; The promise and limitations of aging clocks in measuring meaningful biological aging and predicting health outcomes [48:00]; Why aging clocks are not yet reliable as consumer tools and why traditional health metrics still matter most [52:00]; and More. Connect With Peter on Twitter, Instagram, Facebook and YouTube

    56 min

  3. MAR 23

    #385 - AMA #82: Applying the tools of longevity in the real world: disease prevention, DEXA scans, artificial sweeteners, injury recovery, stability training, habit formation, protein intake and mTOR activation, and more

    View the Show Notes Page for This Episode Become a Member to Receive Exclusive Content Sign Up to Receive Peter's Weekly Newsletter In this "Ask Me Anything" (AMA) episode, Peter answers listener questions across a wide range of topics, focusing on practical decision-making and real-world application. He explores how health priorities and strategies should evolve across different decades of life, which chronic diseases are most challenging to manage and how to think about risk hierarchies, and which emerging interventions—beyond exercise—show the most promise for dementia prevention. Peter also breaks down the utility of wearables and explains how to use and interpret DEXA scans effectively. He discusses the challenges of behavior change and how to make healthy habits stick, along with training strategies for balance, stability, and injury resilience, drawing lessons from his own setbacks. Additional topics include high-protein diets and mTOR, how to weigh mechanisms versus outcomes, how to evaluate diet sodas and non-nutritive sweeteners in context, and a range of listener questions covering health fads, emotional health, and sleep routines. If you're not a subscriber and are listening on a podcast player, you'll only be able to hear a preview of the AMA. If you're a subscriber, you can now listen to this full episode on your private RSS feed or our website at the AMA #82 show notes page. If you are not a subscriber, you can learn more about the subscriber benefits here. We discuss: Overview of episode topics, emphasizing the goal of providing actionable, real-world health guidance  [1:30]; How health priorities and training strategies should evolve from early adulthood through older age [2:45]; Comparing the four major chronic diseases: which are most preventable, most uncertain, and most concerning [8:00]; Emerging strategies for dementia prevention: biomarkers, early detection, and new pharmacologic approaches [15:00]; How to use wearable data effectively: when it's helpful, when it's not, and how to avoid over-reliance [19:00]; DEXA scans: timing, interpretation, and limitations in body composition and bone density tracking [23:00]; Best practices for building sustainable health habits [30:15]; How to train your balance and stability [33:30]; How to recover from injuries and use setbacks to build strength and resilience [36:15]; High protein intake and the impact on mTOR: evaluating mechanisms versus real-world evidence on longevity [38:30]; Diet soda and artificial sweeteners: evaluating risks, benefits, and the importance of context [47:00]; How to balance enjoying life today with making choices that support long-term health and longevity [51:45]; and More. Connect With Peter on Twitter, Instagram, Facebook and YouTube

    19 min

  4. MAR 16

    #384 - Special episode — Obicetrapib: The CETP inhibitor with cardiovascular benefits and potential Alzheimer's prevention

    View the Show Notes Page for This Episode Become a Member to Receive Exclusive Content Sign Up to Receive Peter's Weekly Newsletter In this special episode, Peter takes a deep dive into obicetrapib, an investigational drug that has captured his attention and renewed interest in an entire class of therapies known as CETP inhibitors. He explains what obicetrapib is and how it works, revisits the history of CETP inhibitors and why earlier versions of these drugs failed—sometimes dramatically—and breaks down the key clinical trials designed to evaluate their impact on cardiovascular risk. Peter examines how obicetrapib influences major lipid biomarkers, including LDL cholesterol and lipoprotein(a) [Lp(a)], and discusses emerging evidence from a study that explored the drug's effects on Alzheimer's-related blood biomarkers. He also highlights intriguing findings in individuals carrying the APOE4 allele and reflects on what these early results may mean for both cardiovascular disease prevention and potential implications for Alzheimer's risk, as well as how he is thinking about this therapy in the context of caring for his own patients. We discuss: Introducing obicetrapib: CETP inhibitor history, lipid biology, and early Alzheimer's biomarker signals in APOE4 carriers [2:15]; CETP biology explained: lipoproteins, reverse cholesterol transport, and how CETP inhibition alters HDL and LDL particles [5:15]; The early CETP inhibitor story: why raising HDL cholesterol alone failed to deliver cardiovascular protection [13:45]; The rise and fall of early CETP inhibitors: torcetrapib, dalcetrapib, evacetrapib, and anacetrapib [18:30]; Why obicetrapib may succeed where earlier CETP inhibitors failed [23:30]; The BROADWAY trial: obicetrapib's effects on LDL, ApoB, Lp(a), and residual cardiovascular risk [26:00]; Brain lipid metabolism and APOE4: how CETP inhibition may influence cholesterol transport in Alzheimer's disease [30:45]; Findings from the substudy of the BROADWAY trial which looked at changes in biomarkers of Alzheimer's disease [40:00]; Interpreting the BROADWAY Alzheimer's biomarker results: limitations, cautious optimism, and the need for a dedicated prevention trial [46:45]; Why Peter is optimistic about obicetrapib: cardiovascular benefits, Lp(a) reduction, and the path toward approval [50:00]; and More. Connect With Peter on Twitter, Instagram, Facebook and YouTube

    53 min

  5. JAN 19

    The seed oil debate: are they uniquely harmful relative to other dietary fats? | Layne Norton, Ph.D.

    View the Show Notes Page for This Episode Become a Member to Receive Exclusive Content Sign Up to Receive Peter's Weekly Newsletter Layne Norton is a nutrition scientist and accomplished power athlete,who returns to The Drive for a conversation that departs from the show's usual format. In this episode, Layne presents the evidence-based case that seed oils are not uniquely harmful under isocaloric conditions, while Peter steelmans the strongest versions of the opposing argument that seed oils are inherently harmful. They examine how scientific bias and evidence are evaluated, revisit the historical randomized controlled trials that shaped the seed oil controversy, and explore the mechanistic biology underlying LDL oxidation and atherosclerosis. Along the way, Layne unpacks the chemistry and processing of modern seed oils, assesses evolutionary and ancestral nutrition arguments, clarifies the relationship between seed oils, ultra-processed foods, and contemporary dietary patterns, and situates these questions within the larger context of lifestyle factors that drive cardiometabolic health. Layne concludes by offering practical considerations around dietary fats, cooking oils, and real-world food choices. We discuss: The idea behind this episode, biases, and evidence-based thinking [5:15]; The four core arguments behind claims that seed oils are harmful [12:30]; The Minnesota Coronary Experiment (MCE) [14:30]; The differences among saturated, monounsaturated, polyunsaturated, and trans fats, and why those differences matter for cardiovascular disease [18:30]; Missing trans fat data as a confounder in the Minnesota Coronary Experiment, other limitations of that study, and the challenge detecting meaningful differences in hard outcomes through nutrition research [24:00]; The Sydney Diet Heart Study (SDHS): an attempt to address the "duration problem" by enrolling a much higher-risk population [28:30]; Debating whether evidence from randomized trials supports the idea that seed oils are uniquely harmful once major confounders are removed [34:00]; The Rose Corn Oil trial: an often-cited study used to argue against polyunsaturated fats [36:30]; Three studies where replacing saturated fat with polyunsaturated fat produced different results than earlier trials [41:30]; Layne's explanation for why the evidence is pointing towards cardiovascular risk reduction when substituting polyunsaturated fat for saturated fat [47:30]; What Mendelian randomization says about the causal role of LDL cholesterol in ASCVD [56:45]; The compounding effects of life-long exposure to high LDL cholesterol [1:06:45]; Does the linoleic acid (omega-6) content of seed oils cause inflammation? [1:13:45]; Does the linoleic acid (omega-6) content of seed oils increase oxidized LDL? [1:19:30]; Layne's analogy to explain why lower LDL particle number outweighs higher per-particle oxidation risk when comparing polyunsaturated fats to saturated fats [1:26:15]; The role of oxidized LDL in CVD: exploring differences in a diet high in polyunsaturated fat (seed oils) versus high in saturated fat [1:28:00]; Examining whether industrial processing and solvent extraction of seed oils—especially residual hexane—could plausibly cause long-term harm [1:34:00]; The evolutionary and "ancestral diet" argument against seed oils [1:40:45]; Weighing concerns about industrial processing of seed oils against the totality of metabolic and cardiovascular evidence [1:47:30]; Practical considerations around dietary fats, cooking oils, and real-world food choices [1:50:00]; Comparing the health impact of seed oils with that of caloric intake and activity levels, and how to prioritize interventions [2:00:15]; More. Connect With Peter on Twitter, Instagram, Facebook and YouTube

    2h 8m

  6. JAN 12

    AMA #79: A guide to cardiorespiratory training at any fitness level to improve healthspan, lifespan, and long-term independence

    View the Show Notes Page for This Episode Become a Member to Receive Exclusive Content Sign Up to Receive Peter's Weekly Newsletter In this "Ask Me Anything" (AMA) episode, Peter brings together his most up-to-date thinking on cardiorespiratory fitness into a single, practical guide designed to help listeners structure training for maximal impact on healthspan, lifespan, and long-term independence. He explains why cardiorespiratory fitness is one of the strongest modifiable predictors of longevity, clarifies what zone 2 training actually represents and how it differs from higher-intensity work, and addresses persistent confusion around exercise volume, intensity, and time constraints. The discussion covers how to measure and track progress in zone 2, VO₂ max targets and age-adjusted goals, planning for the marginal decade, and how to balance zone 2 with higher-intensity training across different weekly volumes. Peter also outlines how cardio training should be tailored for beginners, experienced trainees, and older adults, with special considerations for women and guidance on avoiding the most common cardio-training mistakes. If you're not a subscriber and are listening on a podcast player, you'll only be able to hear a preview of the AMA. If you're a subscriber, you can now listen to this full episode on your private RSS feed or our website at the AMA #79 show notes page. If you are not a subscriber, you can learn more about the subscriber benefits here. We discuss: Rational for discussing cardiorespiratory fitness, zone 2, and VO₂ max despite having covered the topic extensively [2:30]; Why cardiorespiratory fitness and VO₂ max are powerful and modifiable predictors of all-cause mortality compared with other health metrics [7:30]; How age-related declines in VO₂ max constrain healthspan and everyday physical function [12:30]; The cardiorespiratory fitness triangle: how different training intensities contribute to building the aerobic base, the aerobic peak, and overall aerobic capacity [14:15]; The cellular mechanics of cardiorespiratory fitness: mitochondria, lactate, muscle fiber recruitment, and intensity thresholds [18:45]; The debate over whether zone 2 training has unique benefits or whether higher-intensity exercise alone is sufficient [27:15]; Balancing intensity and sustainability as training volume increases, and the important role of zone 2 training [32:15]; How to identify your zone 2 training intensity [34:45]; How to measure and track improvements in zone 2 fitness [40:00]; How to accurately measure VO₂ max: lab testing, field tests, and the limits of wearables [45:15]; How to set meaningful VO₂ max targets based on age, sex, long-term decline, and desired physical capabilities later in life [51:15]; How to structure and execute a zone 2 workout [59:45]; How strictly should zone 2 be maintained during a workout? [1:04:00]; How to design a VO₂ max training session: interval length, intensity, recovery, and progression strategies [1:07:00]; Why heart rate is not a reliable metric for titrating VO₂ max interval intensity [1:12:00]; Practical ways to monitor VO₂ max improvements [1:13:30]; How to balance zone 2 and VO₂ max training [1:15:30]; How to structure training for someone limited to 150 minutes per week of total exercise [1:19:00]; How to allocate 150 minutes per week of dedicated cardiorespiratory training between zone 2 and VO₂ max work [1:23:00]; How to structure training for someone with substantial available time who wants to maximize cardiorespiratory fitness [1:24:30]; Why spreading aerobic training across the week beats compressing volume into one session [1:26:15]; How beginners and metabolically unhealthy individuals should start cardiorespiratory training safely [1:28:00]; How "training age" determines the intensity and workload needed to continue improving cardiorespiratory fitness [1:31:15]; Why zone 2 training still matters for women (including postmenopausal women) [1:32:45]; How cardiorespiratory training should adapt with aging [1:35:45]; The most common mistakes people make when training cardiorespiratory fitness and how to avoid them [1:37:45]; How to break through a VO₂ max plateau [1:40:45]; The main takeaways about cardiorespiratory fitness and longevity [1:41:30]; Peter's carve out: oral hygiene and Peter's two-toothbrush system [1:43:00]; and More. Connect With Peter on Twitter, Instagram, Facebook and YouTube

    39 min

  7. JAN 5

    Women's health and performance: how training, nutrition, and hormones interact across life stages | Abbie Smith-Ryan, Ph.D.

    View the Show Notes Page for This Episode Become a Member to Receive Exclusive Content Sign Up to Receive Peter's Weekly Newsletter Abbie Smith-Ryan is a leading researcher in exercise physiology whose work focuses on how training and nutrition influence body composition, metabolism, cardiovascular health, and women's health across the lifespan, with particular attention on perimenopause and post-menopause. In this episode, Abbie explains how early exercise and play help build the foundation for bone health, muscle development, and cardiorespiratory fitness in girls, as well as how puberty and menstruation shape athletic performance, motivation, and recovery. She also explores how women can tailor training and nutrition across the menstrual cycle through smart fueling, hydration, and inflammation management; examines the evidence behind supplements such as creatine, omega-3s, and magnesium; and unpacks the metabolic and body composition changes that accompany the transition into perimenopause and menopause. Finally, she covers practical exercise programming for busy women, training and nutrition considerations during pregnancy and postpartum, and the evolving role of hormone therapy alongside lifestyle-based, evidence-driven approaches that help women better advocate for their health. We discuss: Abbie's background in distance running and her interest in studying women's health around exercise [3:00]; The role of early-life exercise in building lifelong bone, muscle, and cardiovascular health in girls [4:00]; Training principles for premenstrual girls, the risks of early specialization and delayed puberty from intense training, and how youth sport participation can shape bone and spinal health [7:15]; Nutrition as fuel in young female athletes: supporting training, growth, and performance [11:00]; Training and recovery across the menstrual cycle: recovery, nutrition, supplements, and practical strategies for performance support [16:00]; The benefits of creatine supplementation and importance of protein intake across the menstrual cycle [27:15]; How women should approach training intensity and volume across the menstrual cycle [33:00]; How to identify and monitor the perimenopausal transition and why this phase represents a critical window for exercise and nutrition interventions [37:15]; Case study: time-efficient exercise program for a busy, perimenopausal woman [42:00]; Why improving body composition is a better goal than weight loss, and how to set realistic fat-loss targets in midlife women [53:30]; How to preserve muscle and bone while using GLP-1 medications: resistance training, protein intake, and more [58:15]; Designing a three-hour-per-week training plan for sustainable body recomposition [1:03:30]; Abbie's insights from her 20+ years of self-tracking: nutrient timing, injury prevention, excessive training, bone health, and more [1:07:15]; How pregnancy and the postpartum period affect body composition, and how consistent exercise and intentional nutrition can prevent a permanent shift in body fat or muscle mass [1:13:30]; Changes in muscle quality and metabolic flexibility during perimenopause and menopause, and how exercise may counteract hormonally driven sarcopenia [1:21:45]; The biggest open questions about women's health: combining menopause hormone therapy with exercise, GLP-1 drugs, minimizing injury risk, and more [1:32:00]; How the training response differs between men and women, and the importance of type IIa muscle fibers [1:39:15]; Training advice for the hypothetical 70-year-old woman who has never exercised deliberately [1:47:00]; Misinformation about exercise and nutrition for women, injury risk, supplement hype, and the need for more nuanced messaging around hormones, recovery, and midlife training [1:53:30]; Benefits of hormone therapy in midlife women and its interaction with exercise and lifestyle interventions [2:00:15]; Peter's overall take on how women should approach exercise volume and intensity at various life phases and time constraints [2:03:00]; and More. Connect With Peter on Twitter, Instagram, Facebook and YouTube

    2h 12m

  8. 12/29/2025

    Building & Changing Habits | James Clear (#183 rebroadcast)

    View the Show Notes Page for This Episode Become a Member to Receive Exclusive Content Sign Up to Receive Peter's Weekly Newsletter James Clear is the author of the New York Times bestseller Atomic Habits. His extensive research into human behavior has helped him identify key components of habit formation and develop the "Four Laws of Behavioral Change." In this episode, James provides insights into how both good and bad habits are formed, including the influence of genetics, environment, social circles, and more. He points to changes one can make to cultivate more perseverance and discipline and describes the profound impact habits can have when tying them into one's self-identity. Finally, James breaks down his "Four Laws of Behavioral Change" and how to use them to create new habits, undo bad habits, and make meaningful changes in one's life. We discuss: Why James became deeply interested in habits [1:45]; Viewing habits through an evolutionary lens [6:00]; The power of immediate feedback for behavior change, and why we tend to repeat bad habits [9:15]; The role of genetics and innate predispositions in determining one's work ethic and success in a given discipline [14:30]; How finding one's passion can cultivate perseverance and discipline [23:15]; Advantages of creating systems and not just setting goals [29:15]; The power of habits combined with self-identity to induce change [36:30]; How a big environmental change or life event can bring on radical behavioral change [50:30]; The influence of one's social environment on their habits [54:15]; How and why habits are formed [1:00:30]; How to make or break a habit with the "Four Laws of Behavior Change" [1:09:30]; Practical tips for successful behavioral change—the best strategies when starting out [1:16:15]; Self-forgiveness and getting back on track immediately after slipping up [1:30:30]; Law #1: Make it obvious—Strategies for identifying and creating cues to make and break habits [1:39:45]; Law #2: Make it attractive—examples of ways to make a new behavior more attractive [1:47:45]; Law #3: Make it easy—the 2-minute rule [1:58:45]; Law #4: Make it satisfying—rewards and reinforcement [2:03:30]; Advice for helping others to make behavioral changes [2:06:00]; More. Connect With Peter on Twitter, Instagram, Facebook and YouTube

    2h 20m
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About

Expert insight on health, performance, longevity, critical thinking, and pursuing excellence. Dr. Peter Attia (Stanford/Hopkins/NIH-trained MD) talks with leaders in their fields.

Information

  • Creator
    Peter Attia, MD
  • Years Active
    2018 - 2026
  • Episodes
    434
  • Rating
    Explicit
  • Copyright
    Copyright © Peter Attia, MD
  • Show Website
    The Peter Attia Drive

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