Compare experts › Rangan Chatterjee vs Gary Brecka

Rangan Chatterjee vs Gary Brecka

Rangan Chatterjee (doctor, former nhs gp) 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 both See the protocols

Words explained (9)

Intervals: Short hard efforts with easy recovery in between, such as 30 seconds fast, 90 seconds slow.
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.
Glucose: Blood sugar.
Mitochondria: The parts of your cells that turn food and oxygen into energy.
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.

At a glance

Measure	Rangan Chatterjee	Gary Brecka
Background	Doctor, former NHS GP	Wellness entrepreneur (not a doctor)
Training split	30% strength · 50% aerobic · 15% intervals · 5% mobility	20% strength · 55% aerobic · 5% intervals · 20% mobility
Signature habit	Relax · eat · move · sleep	Sunlight, breathwork, cold
Protein	No fixed target	~30 g soon after waking
Training style	Lifestyle	Morning rituals
Overall evidence	Solid	Mostly weak
Following	Instagram 1.7M · YouTube 1.4M	Instagram 3M · YouTube 63K

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

The key differences

Chatterjee puts more of the week into strength: about 30% against 20%.
Chatterjee puts more of the week into intervals: about 15% against 5%.
Brecka puts more of the week into mobility and stability: about 20% against 5%.
In plans in their style, both use 1-minute intervals for hard sessions.
We rate the evidence behind Chatterjee's protocol higher: solid, against mostly weak for Brecka.
Supplements that go into a plan: Chatterjee, none (food first); 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

Rangan Chatterjee

Walk at least 10,000 steps a daySome evidence
Strength training twice a weekStrong evidence
Short daily glute exercises (e.g. hip extensions), a couple of minutesPersonal habit
Five-minute home workout: five moves back to back, 20 s on / 40 s off for beginners or 40 s on / 20 s off for advanced, five roundsSome evidence
Swap any move that is too hard, painful or unsafeNote

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

Rangan Chatterjee

Eat within a 12-hour window (for example 8am to 8pm), leaving about 12 hours a day without foodSome evidence
Five portions of different vegetables every dayStrong evidence
Around eight glasses of water a dayPersonal habit
Eat at least one meal a day at a table, with no phone or device nearbyPersonal habit
No fixed protein target in the sources we checkedNote

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

Rangan Chatterjee

No specific guidance in what we reviewed.

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

Rangan Chatterjee

A tech-free wind-down before bed, ideally about 90 minutesSome evidence
Set a cut-off for work email in the evening (e.g. 8–8:30pm)Personal habit
Avoid emotionally charged topics, such as money worries, late in the eveningPersonal habit
Get daylight or time in nature in the morning, even five minutes, to help set the body clockSome evidence

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

Rangan Chatterjee

A daily stillness practice, starting with two minutes of meditationSome evidence
3-4-5 breathing: in for 3, hold for 4, out for 5, for about five minutesSome evidence
One full screen-free day a weekPersonal habit
Before bed, write down three things that went well and whySome evidence
Five minutes a day enjoying natureSome evidence

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

Weak spots to know

Rangan Chatterjee

The 4 pillar approach is broad, sensible lifestyle advice, but the evidence behind specific claims is mixed; for example, a large trial found a daily eating window added no significant weight loss on top of cutting calories.
Some targets are round rules of thumb rather than research-based numbers: the 10,000-step goal is higher than where the benefit levels off for people over 60 (about 6,000–8,000), and eight glasses of water a day is a convention, not a tested target.
He has commercial ties alongside his health advice: books, an app and a paid community, and since 2023 an advisory role with Levels, a glucose-monitoring company.

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 Chatterjee, 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 Chatterjee's style Plan in Brecka's style Mix both

Questions

What is the main difference between Rangan Chatterjee and Gary Brecka?

Their training split differs most in mobility and stability: Chatterjee about 5%, Brecka about 20% (our estimate from their published routines). Chatterjee's signature habit is Relax · eat · move · sleep; Brecka's is Sunlight, breathwork, cold.

How much protein do Chatterjee and Brecka recommend?

Chatterjee: No fixed target. Brecka: ~30 g soon after waking.

Whose advice has stronger evidence?

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

Do Chatterjee and Brecka disagree?

Not directly in what we reviewed. Their differences are in emphasis: chatterjee puts more of the week into strength: about 30% against 20%.

Can I combine Chatterjee 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: Rangan Chatterjee · Gary Brecka. Reviewed October 2026.