Compare experts › Peter Attia vs Gary Brecka

Peter Attia vs Gary Brecka

Peter Attia (physician) and Gary Brecka (wellness entrepreneur (not a doctor)) side by side: how they train, eat, supplement and sleep, how strong the evidence is, and how to build a plan from either or both.

Build a plan from bothSee the protocols
Words explained (16)
Zone 2
Steady cardio at a pace where you can still talk in full sentences, but not sing.
VO2 max
The most oxygen your body can use in hard exercise. A good measure of fitness; higher is better.
Intervals
Short hard efforts with easy recovery in between, such as 30 seconds fast, 90 seconds slow.
4 × 4
Four rounds of 4 minutes hard with 3 minutes easy in between. Also called Norwegian intervals.
Hinge
A movement that bends at the hips with a straight back, like a deadlift or picking a box up from the floor.
Loaded carry
Walking while holding something heavy, like shopping bags or dumbbells.
Mobility
Moving your joints freely through their full range.
Creatine
A well-studied supplement that supports strength and muscle.
Omega-3 (EPA, DHA)
Healthy fats found mostly in oily fish such as salmon, herring and sardines.
Time-restricted eating
Eating all your meals within a set window of the day, for example 8am to 6pm.
ApoB
A blood test that counts the particles carrying cholesterol. Linked to heart disease risk.
Mitochondria
The parts of your cells that turn food and oxygen into energy.
Rapamycin, metformin
Prescription drugs that some experts take hoping to slow ageing. Not proven for that, and never part of your plan.
MTHFR, methylation
A gene and the chemical process it helps with. The common variants are very frequent, and testing them is not recommended for most people.
Medicine 3.0
Peter Attia's name for preventing disease early instead of treating it late.
Centenarian
Someone aged 100 or older.

At a glance

MeasurePeter AttiaGary Brecka
BackgroundPhysicianWellness entrepreneur (not a doctor)
Training split40% strength · 40% aerobic · 10% intervals · 10% mobility20% strength · 55% aerobic · 5% intervals · 20% mobility
Signature habitZone 2 + VO2 maxSunlight, breathwork, cold
Protein1.6–2.2 g/kg~30 g soon after waking
Training styleBalancedMorning rituals
Overall evidenceStrongMostly weak
FollowingInstagram 1.6M · YouTube 1MInstagram 3M · YouTube 63K

Training splits are our estimates from each expert’s published routine. Following checked October 2026.

The key differences

  • Attia puts more of the week into strength: about 40% against 20%.
  • Brecka puts more of the week into aerobic base (zone 2): about 55% against 40%.
  • Brecka puts more of the week into mobility and stability: about 20% against 10%.
  • In plans in their style, Attia's hard sessions are 4-minute intervals (Norwegian 4 × 4); Brecka's are 1-minute intervals.
  • We rate the evidence behind Attia's protocol higher: strong, against mostly weak for Brecka.
  • Supplements that go into a plan: Attia, omega-3; Brecka, omega-3 fish oil, creatine monohydrate. Prescription items and personal stacks stay out of every plan.
  • Both include their own mobility or movement routine.

Protocols side by side

Each line is rated for the evidence behind it. “Doctor only” items never go into a plan.

Training

Peter Attia

  • Zone 2 cardio (a steady pace where you can still talk) about 3 hours a week, for example 4 × 45 min. Start with about 2 hours if new to itStrong evidence
  • VO2 max intervals: 4 min hard, 4 min easy, repeated 4–6 times, once or twice a weekSome evidence
  • Heavy strength training 3–5 times a week, focusing on grip, slow lowering, pulling and hip-hinge movementsStrong evidence
  • Stability and balance work woven into most daysSome evidence
  • Benchmarks such as carrying half your body weight in each hand for 1 minute (men; about 75% of that for women) and long dead hangsPersonal habit
  • Choose the physical tasks you want to manage at 100 and train toward them nowNote

Gary Brecka

  • About 30 minutes of low-intensity movement in the morning (part of the '30-30-30' idea he promotes)Strong evidence
  • Stay mobile and active every dayStrong evidence
  • Exercise while breathing extra oxygen (EWOT)Personal habit
  • Gives few specific strength-training targetsNote

Eating

Peter Attia

  • Protein at least 1.6 g per kg of body weight a day. About 2.2 g/kg is the better target for active people with healthy kidneysSome evidence
  • Spread protein across about four meals of roughly 40–50 gPersonal habit
  • Follows no named diet. Focuses on energy balance and avoiding junk foodNote
  • Doubts time-restricted eating as a general tool and saves longer fasts for specific patientsNote
  • Says alcohol has no biochemical benefit. Personally keeps it to 0–8 drinks a week, at most 2 a dayPersonal habit

Gary Brecka

  • About 30 g of protein within 30 minutes of wakingSome evidence
  • Avoid processed foods; eat whole foodsStrong evidence
  • Lower-carb or ketogenic plans for weight loss in some clients, guided by blood testsDoctor only

Supplements

Peter Attia

  • Fish oil reported at about 2 g EPA + 1.5 g DHA a day, aiming for a blood omega-3 level of about 8–12%Some evidence
  • Vitamin D, reported at about 5,000 IU a dayPersonal habit
  • Magnesium from several forms, about 1 g elemental a day in total (reported)Personal habit
  • Methylfolate and vitamin B12 to keep homocysteine below about 9 µmol/L, based on blood testsDoctor only
  • Prescription drugs such as statins or PCSK9 inhibitors to lower apoB when neededDoctor only
  • Treats rapamycin and metformin as unproven, experimental options, not general adviceNote

Gary Brecka

  • Vitamin D3, ideally guided by a blood testDoctor only
  • Omega-3 fish oil in the morningSome evidence
  • Methylfolate and methylated B vitamins based on a methylation gene testPersonal habit
  • Hydrogen water tabletsPersonal habit
  • Creatine (sold under his brand)Some evidence
  • Peptides such as BPC-157 and TB-500 (he is a fan)Doctor only

Sleep & recovery

Peter Attia

  • Allow 8–9 hours in bed with a fixed wake-up timeStrong evidence
  • Cool, dark bedroom, about 18 °CSome evidence
  • No food in the last three hours and no alcohol close to bedtimeSome evidence
  • Screens off well before bed. He keeps a second phone with no social appsPersonal habit
  • Sleep aids he has reported using: glycine, ashwagandha and magnesium L-threonate. Melatonin only for jet lagPersonal habit

Gary Brecka

  • Morning daylight to set the body clockStrong evidence
  • Short daily cold water exposureSome evidence
  • Red light therapy bed, about 20 minutesPersonal habit
  • Hyperbaric oxygen and cryotherapy at homePersonal habit

Stress & mind

Peter Attia

  • Treats emotional health as a pillar as important as physical healthNote
  • Journaling as a regular practicePersonal habit
  • Keeps social media off his evening phone to protect wind-down timePersonal habit

Gary Brecka

  • Wim Hof-style breathing: 3 rounds of 5–30 breaths, then a breath hold, always seatedSome evidence
  • Same routine at the same time each dayPersonal habit
  • Barefoot grounding outdoorsPersonal habit

Brain health

Peter Attia

  • Regular dry sauna (Outlive cites about 4 × 20 min a week at 80 °C or more, linked in Finnish studies to lower dementia risk)Some evidence
  • Sees ketogenic eating as a possible alternative brain fuel in early cognitive decline, based on small trialsSome evidence
  • Says the benefit of vitamin D for dementia risk is unclearNote

Gary Brecka

No specific guidance in what we reviewed.

Weak spots to know

Peter Attia

  • Many of his exercise targets lean on observational studies that link fitness or strength to longer life. These show association, not proof that hitting a given number will add years.
  • A 2026 review in the Australian Journal of General Practice called the book's research base superficial. It said his intensive, personalised approach suits only a few affluent people, and that routine full-body MRI scans use a lot of resources and bring risks from incidental findings that the book does not discuss.
  • Some critics argue that the medications and screening tests he recommends for healthy people lack strong trial evidence, and that the risks could outweigh the benefits.

Gary Brecka

  • He is not a medical doctor or a research scientist; McGill University's Office for Science and Society (Jonathan Jarry, 2025) called his expertise questionable and said the health interventions he points customers to run from unproven to pseudoscientific.
  • His MTHFR claims run against medical genetics guidance: the American College of Medical Genetics and Genomics has advised against routine MTHFR variant testing since 2013 (updated 2020).
  • Hydrogen water, grounding and red light are presented with more certainty than the research supports; the McGill review described hydrogen research as small and early, and grounding as pseudoscience.

Build a plan from Attia, Brecka or both

Your free plan shows a week of gym sessions, cardio, a day of eating, supplements and mobility, fitted to your age, time and health.

Plan in Attia's stylePlan in Brecka's styleMix both

Questions

What is the main difference between Peter Attia and Gary Brecka?

Their training split differs most in strength: Attia about 40%, Brecka about 20% (our estimate from their published routines). Attia's signature habit is Zone 2 + VO2 max; Brecka's is Sunlight, breathwork, cold.

How much protein do Attia and Brecka recommend?

Attia: 1.6–2.2 g/kg. Brecka: ~30 g soon after waking.

Whose advice has stronger evidence?

We rate the evidence behind Attia's protocol higher: strong, against mostly weak for Brecka.

Do Attia and Brecka disagree?

Not directly in what we reviewed. Their differences are in emphasis: attia puts more of the week into strength: about 40% against 20%.

Can I combine Attia and Brecka?

Yes. In Build my mix you choose one expert per area, for example one for strength and another for eating. Your free plan shows the result straight away.

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Full sources are on each profile: Peter Attia · Gary Brecka. Reviewed October 2026.