The Peter Attia Drive – Episode #369

“Rethinking protein needs for performance, muscle preservation, and longevity, and the mental and physical benefits of creatine supplementation and sauna use” – With Rhonda Patrick, Ph.D.
Date: October 20, 2025 | Host: Peter Attia, MD | Guest: Rhonda Patrick, Ph.D.

Overview

In this info-packed episode, Peter Attia welcomes back Dr. Rhonda Patrick for their third deep-dive conversation. This two-plus-hour discussion draws on Rhonda’s expertise in nutrition, aging, and disease prevention. Together, they rigorously examine:

• Why the current Recommended Dietary Allowance (RDA) for protein is too low, and what an optimal intake looks like for different life stages and health goals
• The concept and consequences of anabolic resistance, particularly in aging and inactivity
• The case for higher protein dosing during key life moments, or when using drugs like GLP-1 agonists
• Myths and facts about MTOR, protein intake, and cancer risk
• The overlooked but profound benefits of creatine supplementation for both muscle and cognitive health—with practical dosing guidance for a range of populations
• The science of sauna use—with practical tips on temperature, frequency, and the nuanced differences between traditional and infrared saunas.

Throughout, both speakers blend evidence, high-level nuance, and practical recommendations driven by the latest research.

Protein: RDA, Myths, and the Case for Higher Intake

The Current RDA Is Too Low – Flawed Science

• Rhonda criticizes the origins of the 0.8g/kg RDA:

  “What it should be called is the minimalist daily allowance... people confuse that with the optimal amount.” (04:25 - B)

• The nitrogen balance studies underlying the RDA were flawed—due to incomplete collection and unaccounted nitrogen loss (06:29).
• Stable isotope tracer studies using labeled phenylalanine now show the true minimum to avoid negative protein balance is closer to 1.2g/kg—“50% more than the RDA” (10:08 – B).
• Most U.S. adults, especially women and older adults, are only just hitting (or falling short of) the inadequate RDA (10:08–11:25).

Why Protein Intake Matters

• You only “store” amino acids in skeletal muscle. If intake falls short, you catabolize muscle—a “strategic error and an unforced error” (08:09 – A).
• Peter:

  “…you immediately start to catabolize or break down muscle…giving up muscle mass…would be a strategic error and an unforced error.” (08:09 – A)

Anabolic Resistance & The Role of Activity

• With aging and/or inactivity, muscles become less sensitive to amino acids (anabolic resistance). Older adults may need more protein (double) to get the same anabolic response as the young (15:56 – B).
• Physical activity, chiefly resistance training, restores this sensitivity (“the activity makes up for it” 17:29 – A).
• Startling stat: Only 22% of older adults engage in resistance training (18:40 – B).
• Rhonda:

  “If older adults just do [1.2g/kg], they’re actually preventing a lot of the age-related loss in muscle that occurs.” (12:22 – B)

• Peter:

  “If there’s a public health message in this episode, it really is: you should be training.” (17:59 – A)

Frailty, Sarcopenia, and “Banking” Muscle

• Preventing frailty and sarcopenia determines late-life quality:

  “Frailty is the thing that seems to determine the quality of your final decade on this earth… Despite the fact that most people have witnessed it…” (19:57 – A)

• Life events (falls, surgeries, illness) create sudden, often irrecoverable muscle losses (24:44).

How Much Protein is “Optimal”? (Not Just Minimums)

Rethinking Minimums and Optimums

• Summary:
  • Minimum / “New floor”: 1.2g/kg/day (13:47)
  • Optimal for active people or athletes: 1.6g/kg/day and up to 2.2g/kg/day for “banking” muscle or cutting fat (“body recomposition”) (27:05–29:31)
• Diminishing returns above 2g/kg, but higher targets recommended to avoid “bad days” below threshold (32:47, 35:09).

Peter’s Practice-Based Reasoning:

“If you aim for two [grams/kg], on the day you fall short, you’ll still be at 1.6. If you aim for 1.6 and fall short, you’ll be at 1.2, and that won’t be made up for on the next day because the downside is asymmetric compared to the upside.” (67:56 – A)

On Real-Life Adherence:

“…in the real world, you can’t always hit your targets… The days you’re low aren’t made up for by the days you’re high.” (32:47 – A)

Special Populations: Pregnancy, Adolescents, Older & Overweight Adults

• Pregnant women, adolescents: Use at least the new minimum of 1.2g/kg, possibly 1.2–1.6g/kg, due to growth and activity (37:55–39:46).
• For overweight/obese, dose should be based on “goal” (not current) body weight (51:00–51:26).

During Weight Loss / On GLP-1 Agonists

• In caloric deficit (dieting, on GLP-1s): Protein needs are greater (up to 2.2g/kg+) to protect muscle (40:11–41:36, 44:06).

MTOR, Longevity, Cancer Risk — Nuances and Myths

• The longevity benefits of caloric restriction in animals have led to a misplaced fear around protein activating MTOR.
  • Exercise and protein both stimulate MTOR—in muscle, where it’s beneficial (53:27–55:11).
• Data on protein and cancer: Mouse studies are overapplied to humans; epidemiology is muddied by lifestyle confounders, e.g. inactivity and poor diet along with higher meat intake (58:01).
• Key take: Optimal nutrition for active people is different from sedentary ones; “You cannot treat those two people the same way.” (57:14 – A)

On Chronic vs. Acute Pathways:

“We want MTOR on when it has a job to do and…relatively silent when we don’t.” (59:09 – A)

Creatine: More Than Just Muscles

The Muscle Story

• Decades of data: Creatine (5g/day) increases training volume, muscle mass, and strength—“one of the most well-studied sports supplements ever” (70:41 – B).
• It’s effective because it enables “one to two more reps” or more training volume (75:26 – B).
• Vegetarians benefit most, as creatine comes primarily from meat and their endogenous synthesis is limited (73:43–74:03).

The Brain & Cognition Story

• Brain creatine rises with higher doses (10g/day), as muscles “hog” most creatine up to 5g; most early cognition studies were underdosed and may thus be underestimating benefit (78:26–79:44).
• Cognitive benefits (processing speed, memory) are more pronounced during stress (sleep deprivation, psychological stress, neurodegeneration).

  “It works in the background of stress… sleep deprivation, psychological stress… That’s where creatine really shines in terms of cognitive function.” (79:56 – B)

• Clear benefit for sleep deprivation: High-dose creatine (20–25g, one time, by body weight) “prevented the usual cognitive deficits and improved processing speed beyond baseline” (81:06–82:54).
• Preliminary data: 20g/day improved cognition in Alzheimer’s patients (84:09–84:33).

Dosing & Supplement Quality

• Muscle: 5g/day is sufficient.
• Brain/cognitive: 10g/day (2 × 5g doses) likely required (86:45).
• High-stress/jetlag: Up to 15–20g/day (85:52).
• Kids: ~0.1g/kg body weight; Rhonda gives her young son 2.5g/day (90:44–90:52).

On Safe Use:

• No credible evidence of harm or kidney issues at these doses in healthy people. (91:29–91:48)
• Creatine “gummies” generally contain no active ingredient—stick to monohydrate powder, ideally with NSF or Creapure certification (87:15–89:40).

Notable Quotes:

“Creatine for the brain is the most interesting aspect of this area of research right now… There’s really no downside to doing 10 grams a day.” (85:16 – B)

Sauna: Cardiovascular, Neuroprotection & Best Practices

Mechanisms: Heat, Hormesis & Heat Shock Proteins

• Sauna induces a “heat shock” response, increasing protective heat shock proteins by ~50% (95:17).
• Effect is both cardiovascular (VO2 max improvements, cardiac adaptation) and neural (protection from protein misfolding linked to dementia) (93:41–95:28; 101:53).

Frequency, Temperature, & Infrared vs. Dry Sauna

• Classic Finnish data: 4–7x/week at ≥175°F for 20 minutes → 66% reduction in dementia risk (103:16–103:19).
• Most research is on dry saunas; infrared saunas require much longer exposure (double or more, e.g. 40–85 minutes) to achieve the same effect (96:12–97:54).
• For “mental health,” even a single high-temp session can have major effects on depression (100:00).
• Caution: Risks increase above 200°F—higher temps showed higher dementia risk (104:09). “212°F is too hot…potential risk” (105:02–105:25).
• Even 180–190°F is sufficient. “There's no evidence you're getting added benefit [by going hotter]” (104:57–105:02).

  “I hope people that are out there doing the 212 are listening…” (105:07 – B)

Notable Moment:

• Rhonda on her sauna habit:

  “It was incredible, the effect it was having on my mental health and my ability to deal with stress and anxiety so much that I was like, this is insane…” (100:23–100:56 – B)

Final Reflections and Memorable Quotes

Protein

• “…if you aim for two on the day you fall short, you’ll still be at 1.6… So that’s our recommendation clinically, and that’s how we work with real people in the real world, not on our substack pages…” (67:56 – A)

Creatine

• “I have so many vegan friends that it literally changed their lives. My phone blew up. I mean, I couldn't believe the magnitude of effect that these women were experiencing was way outsized compared to what I was getting…” (89:44 – B)

Sauna

• “I know my threshold now. I know the temperature and the duration and the amount of water. I know all those variables.” (101:46 – B)

On Changing Views and Pursuing Nuance

• “If there are data that will make me change my mind, I will stand up here with a straight face and I will eat crow and I will tell you that I've changed my mind. But I'm going to stand by my recommendation.” (67:56 – A)

Timestamps for Major Topics

• RDA controversy & why it’s too low: 4:25–11:25
• Anabolic resistance & role of resistance training: 13:43–19:57
• Frailty, quality of life in aging: 19:57–25:02
• Optimal protein intake, real-world adherence: 27:05–36:13; 66:28–67:56
• Special populations (pregnancy, adolescence, obesity, GLP-1 use): 37:38–51:26
• MTOR, longevity, protein “harm” myth: 51:26–66:28
• Creatine for muscle & cognition: 68:58–91:29
• Who should take creatine, practical dosing: 90:25–91:29
• Sauna science, protocols, practical tips: 93:41–105:31
• Rhonda’s podcasting philosophy: 105:38–107:32

Conclusion

This episode delivers a masterclass in current best practices for protein intake, muscle health, creatine use, and sauna bathing for longevity, performance, and cognitive well-being. In typical Attia-Patrick fashion, the advice is evidence-driven, practical, and adjusted to the realities of human life—not lab conditions. Those wanting clarity on persistent myths in the wellness world—or actionable, prioritized steps for better health—will leave with more than they bargained for.