Compare experts › Mary Claire Haver vs Rangan Chatterjee

Mary Claire Haver vs Rangan Chatterjee

Mary Claire Haver (physician, ob-gyn) and Rangan Chatterjee (doctor, former nhs gp) 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 (11)

Zone 2: Steady cardio at a pace where you can still talk in full sentences, but not sing.
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.
Fibre: The part of plant foods you don't digest. It feeds healthy gut bacteria and keeps you full.
Time-restricted eating: Eating all your meals within a set window of the day, for example 8am to 6pm.
Glucose: Blood sugar.
Perimenopause: The years of changing hormones before periods stop for good.
Hormone therapy (HRT, MHT): Medicine that replaces hormones that fall at menopause. Only a doctor can prescribe it.

At a glance

Measure	Mary Claire Haver	Rangan Chatterjee
Background	Physician, OB-GYN	Doctor, former NHS GP
Training split	55% strength · 40% aerobic · 0% intervals · 5% mobility	30% strength · 50% aerobic · 15% intervals · 5% mobility
Signature habit	Fibre 25 g+ a day	Relax · eat · move · sleep
Protein	80–120 g a day	No fixed target
Training style	Women 40+	Lifestyle
Overall evidence	Strong	Solid
Following	Instagram 3.6M · YouTube 688K	Instagram 1.7M · YouTube 1.4M

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

The key differences

Haver puts more of the week into strength: about 55% against 30%.
Chatterjee puts more of the week into aerobic base (zone 2): about 50% against 40%.
Chatterjee puts more of the week into intervals: about 15% against 0%.
In plans in their style, both use 1-minute intervals for hard sessions.
We rate the evidence behind Haver's protocol higher: strong, against solid for Chatterjee.
Supplements that go into a plan: Haver, none (food first); Chatterjee, none (food first). Prescription items and personal stacks stay out of every plan.
Only Chatterjee has a mobility or movement routine of their own.

Protocols side by side

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

Training

Mary Claire Haver

Full-body weight training at least 2 days a week (she does 3–4), progressing gradually, ideally with a trainerStrong evidence
Walk at least 3 days a week; beginners start with 5–10 minutes a dayStrong evidence
To progress: add a weighted vest to walks, more steps, or a third lifting dayPersonal habit
No exercise types need to be avoided in menopause; strength, cardio, stretching and mind-body work all matterNote

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

Eating

Mary Claire Haver

Protein about 1.5 g per kg of healthy body weight a day, with about 1.8 g/kg as a stretch goalSome evidence
Fibre at least 25 g a day, building slowly towards 30–45 gStrong evidence
Eat about 30 different plant foods a week (vegetables, fruit, nuts, seeds, grains, herbal teas)Some evidence
Anti-inflammatory, Mediterranean-style eating: limit added sugar and processed carbohydrate, add leafy greens, olive oil, berries, nuts and fermented foodsStrong evidence
Spread protein across meals and snacks, each paired with a healthy fat and a healthy carbohydratePersonal habit
She originally promoted 16:8 intermittent fasting but has pulled back, saying it can make enough protein hard to reachNote

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

Supplements

Mary Claire Haver

Omega-3, vitamin D and vitamin K among the supplements she takes; she does not give general dosesPersonal habit
Fibre supplement if diet alone falls short of the daily targetPersonal habit
Check with your doctor before starting any new supplementNote
She sells her own supplement line ('Pause), so weigh her product recommendations with that in mindNote

Rangan Chatterjee

No specific guidance in what we reviewed.

Sleep & recovery

Mary Claire Haver

Menopausal hormone therapy, chosen with a doctor; she calls it the most effective treatment for hot flushes and night sweatsDoctor only
Prefers non-oral (patch, gel, spray) oestrogen, which carries a lower clot risk than tablets; progesterone for women with a uterusDoctor only
Magnesium (L-threonate) and a sleep supplement in her own routinePersonal habit

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

Stress & mind

Mary Claire Haver

Journal for a few minutes every dayPersonal habit
Add meditation, using an app or free guided sessionsSome evidence
Prepare questions before midlife health check-ups and push for proper care of symptomsPersonal habit

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

Brain health

Mary Claire Haver

Points to observational data linking longer lifetime oestrogen exposure, including hormone therapy, with better cognition; not a licensed reason to start hormonesDoctor only
Creatine for possible memory and mood benefits; most of this evidence is from small or non-menopausal studiesSome evidence
Strength training, protein and fibre as part of reducing long-term risks such as dementia, heart disease and diabetesSome evidence

Rangan Chatterjee

No specific guidance in what we reviewed.

Weak spots to know

Mary Claire Haver

Several menopause specialists, quoted in a 2024 New York Times report, said she promotes hormone use beyond official guidelines; one said patients now ask for hormones to prevent heart disease or dementia, or testosterone for general wellbeing.
Commercial ties, stated neutrally: she owns The 'Pause Life (a multimillion-dollar business selling supplements, programmes and online courses) and a cash-pay menopause clinic. The Menopause Society discourages doctors from selling their own products, and the advertising watchdog Truth in Advertising flagged some product claims; according to the New York Times, she then hired a consultant to review the claims on her website.
An independent review by ConsumerLab found some of her supplements costly for what they contain, with creatine claims that overstate the evidence and a vitamin D dose at the upper safe limit.

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.

Build a plan from Haver, Chatterjee 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 Haver's style Plan in Chatterjee's style Mix both

Questions

What is the main difference between Mary Claire Haver and Rangan Chatterjee?

Their training split differs most in strength: Haver about 55%, Chatterjee about 30% (our estimate from their published routines). Haver's signature habit is Fibre 25 g+ a day; Chatterjee's is Relax · eat · move · sleep.

How much protein do Haver and Chatterjee recommend?

Haver: 80–120 g a day. Chatterjee: No fixed target.

Whose advice has stronger evidence?

We rate the evidence behind Haver's protocol higher: strong, against solid for Chatterjee.

Do Haver and Chatterjee disagree?

Not directly in what we reviewed. Their differences are in emphasis: haver puts more of the week into strength: about 55% against 30%.

Can I combine Haver and Chatterjee?

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.

More comparisons

Peter Attia vs Mary Claire Haver Andrew Huberman vs Mary Claire Haver Andy Galpin vs Mary Claire Haver Gabrielle Lyon vs Mary Claire Haver Rhonda Patrick vs Mary Claire Haver Layne Norton vs Mary Claire Haver Peter Attia vs Rangan Chatterjee Andrew Huberman vs Rangan Chatterjee Andy Galpin vs Rangan Chatterjee Gabrielle Lyon vs Rangan Chatterjee Rhonda Patrick vs Rangan Chatterjee Layne Norton vs Rangan Chatterjee All comparisons →

Full sources are on each profile: Mary Claire Haver · Rangan Chatterjee. Reviewed October 2026.