Compare experts › Gabrielle Lyon vs Mary Claire Haver

Gabrielle Lyon vs Mary Claire Haver

Gabrielle Lyon (physician (do)) and Mary Claire Haver (physician, ob-gyn) 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 (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.
Leucine
A building block of protein that helps switch on muscle building. Meat, fish, eggs, dairy and soy are rich in it.
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.
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

MeasureGabrielle LyonMary Claire Haver
BackgroundPhysician (DO)Physician, OB-GYN
Training split60% strength · 20% aerobic · 15% intervals · 5% mobility55% strength · 40% aerobic · 0% intervals · 5% mobility
Signature habit30–50 g protein a mealFibre 25 g+ a day
Protein~2.2 g per kg ideal weight80–120 g a day
Training styleMuscle-firstWomen 40+
Overall evidenceStrongStrong
FollowingInstagram 1.2M · YouTube 288KInstagram 3.6M · YouTube 688K

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 aerobic base (zone 2): about 40% against 20%.
  • Lyon 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 overall evidence behind both protocols as strong.
  • Supplements that go into a plan: Lyon, creatine monohydrate; Haver, none (food first). Prescription items and personal stacks stay out of every plan.
  • Only Lyon 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

Gabrielle Lyon

  • Resistance training 3–4 days a week, done with focusStrong evidence
  • 1–2 days a week of short, higher-intensity intervalsSome evidence
  • Steady aerobic work, such as a 30-minute session or a brisk walkStrong evidence
  • Move after meals: a walk, some air squats or a short bodyweight circuitSome evidence
  • For older adults who do nothing yet, any regular resistance training is the priorityStrong evidence

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

Eating

Gabrielle Lyon

  • About 2.2 g per kg of ideal body weight a day (she also gives 1.2–1.6 g per kg, sometimes up to 1.8 g per kg)Some evidence
  • 30–50 g of high-quality protein at the first meal, and a similar large dose at the last mealSome evidence
  • About 2.5 g of leucine (roughly 30 g of quality protein) per meal, and about 9 g of leucine across the daySome evidence
  • People eating mainly plants may need more total protein, around 1.6 g per kg, because plant protein is lower quality per gramSome evidence
  • For inactive people, about 130 g of carbohydrate a day, roughly 40–50 g per meal, with more after exercisePersonal habit
  • Older adults should avoid long fasts, which can speed muscle lossSome evidence

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

Supplements

Gabrielle Lyon

  • Creatine supports muscle; she mentions possible brain benefits at higher dosesSome evidence
  • Prefer complete protein foods over leucine alone; amino acid supplements make most sense when a meal is low in proteinNote
  • She regards the official leucine allowance (about 2.7 g a day) as too low because it was based on young menNote

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

Sleep & recovery

Gabrielle Lyon

No specific guidance in what we reviewed.

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

Stress & mind

Gabrielle Lyon

No specific guidance in what we reviewed.

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

Brain health

Gabrielle Lyon

No specific guidance in what we reviewed.

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

Weak spots to know

Gabrielle Lyon

  • Her daily target of about 2.2 g per kg of ideal body weight is well above the official allowance of 0.8 g per kg and the 1.0–1.2 g per kg that an expert group recommends for over-65s; whether intakes that high add further benefit for most older adults is still debated.
  • The 'leucine threshold' idea behind her per-meal targets and her food rankings is contested; critics such as Simon Hill argue that total protein matters more and that well-chosen plant proteins can meet needs.
  • Some of the foundational research she draws on, such as Layman's 2005 study, was partly funded by beef and food industry groups.

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.

Build a plan from Lyon, Haver 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 Lyon's stylePlan in Haver's styleMix both

Questions

What is the main difference between Gabrielle Lyon and Mary Claire Haver?

Their training split differs most in aerobic base (zone 2): Lyon about 20%, Haver about 40% (our estimate from their published routines). Lyon's signature habit is 30–50 g protein a meal; Haver's is Fibre 25 g+ a day.

How much protein do Lyon and Haver recommend?

Lyon: ~2.2 g per kg ideal weight. Haver: 80–120 g a day.

Whose advice has stronger evidence?

We rate the overall evidence behind both protocols as strong.

Do Lyon and Haver disagree?

Not directly in what we reviewed. Their differences are in emphasis: haver puts more of the week into aerobic base (zone 2): about 40% against 20%.

Can I combine Lyon and Haver?

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: Gabrielle Lyon · Mary Claire Haver. Reviewed October 2026.