Compare experts › Bryan Johnson vs Mike Israetel

Bryan Johnson vs Mike Israetel

Bryan Johnson (entrepreneur, founder of blueprint) and Mike Israetel (sport physiologist (phd)) 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.

Words explained (12)
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.
4 × 4
Four rounds of 4 minutes hard with 3 minutes easy in between. Also called Norwegian intervals.
Hypertrophy
Muscle growth.
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.
Rapamycin, metformin
Prescription drugs that some experts take hoping to slow ageing. Not proven for that, and never part of your plan.

At a glance

MeasureBryan JohnsonMike Israetel
BackgroundEntrepreneur, founder of BlueprintSport physiologist (PhD)
Training split30% strength · 40% aerobic · 20% intervals · 10% mobility65% strength · 25% aerobic · 5% intervals · 5% mobility
Signature habitSleep-first, measure everything2 × 30 min, close to failure
Protein~130 g a dayNo fixed target
Training styleMeasure everythingMuscle-building
Overall evidenceMixedSolid
FollowingInstagram 2.8M · YouTube 2.2MYouTube 3.9M

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

The key differences

  • Israetel puts more of the week into strength: about 65% against 30%.
  • Johnson puts more of the week into aerobic base (zone 2): about 40% against 25%.
  • Johnson puts more of the week into intervals: about 20% against 5%.
  • In plans in their style, Johnson's hard sessions are 4-minute intervals (Norwegian 4 × 4); Israetel's are 1-minute intervals.
  • We rate the evidence behind Israetel's protocol higher: solid, against mixed for Johnson.
  • Supplements that go into a plan: Johnson, creatine monohydrate, omega-3; Israetel, none (food first). Prescription items and personal stacks stay out of every plan.
  • Only Johnson 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

Bryan Johnson

  • About 150 minutes a week of moderate cardio (Zone 2, a pace where you can still talk)Strong evidence
  • About 75 minutes a week of vigorous work such as high-intensity intervalsStrong evidence
  • Strength training 3 times a weekStrong evidence
  • Balance, flexibility and mobility work included in the daily sessionSome evidence
  • 2–3 minutes of light movement every 30 minutes of sitting, plus two 10-minute walks a daySome evidence
  • He says even 20 minutes of exercise a day is worthwhile for people starting outNote

Mike Israetel

  • For the average person, about 30 minutes of training twice a week gives the best return on time.Some evidence
  • After 40: most sets in the 10–20 rep range, some at 20–30, and 5–10 reps only rarely, because heavy low-rep sets raise the risk of injury.Some evidence
  • Train each muscle twice a week, starting with 1–2 hard sets per muscle per session, and add a set the next week if you recovered well.Some evidence
  • Lower the weight slowly and pause for 1–2 seconds at the bottom.Some evidence
  • Warm up more: three warm-up sets (light, medium, heavier) before the first working set, and 1–2 before each later exercise.Personal habit
  • Add weight in small steps: rarely more than about 2.5 kg or one rep per set at a time.Personal habit
  • Choose joint-friendly exercises with a high stimulus, for example a hack squat instead of a heavy back squat.Some evidence
  • Take a planned easy week every 4–6 weeks, and a lower-volume month about every 5 months.Personal habit

Eating

Bryan Johnson

  • About 2,250 kcal a day, which he describes as roughly 10% below his energy needsSome evidence
  • About 130 g protein a day, much of it from plant foods, protein powders and collagenPersonal habit
  • Lots of vegetables, legumes (black lentils, chickpeas), berries, nuts and extra-virgin olive oil (about 1 tbsp per meal)Strong evidence
  • All food eaten between about 5:30 am and noonPersonal habit
  • Stops drinking fluids at about 4 pm to avoid waking at nightPersonal habit
  • Follows no named diet; he says he avoids labels such as vegan or ketoNote

Mike Israetel

  • If you want to gain muscle, only gain weight when you are lean: about 0.25 kg a week for 4–8 weeks, then a fat-loss phase.Personal habit
  • Stay under about 20% body fat while gaining, come back to about 15% afterwards, and get blood tests after gaining phases.Personal habit

Supplements

Bryan Johnson

  • Creatine, 7.5 g a day in totalSome evidence
  • Omega-3 (EPA/DHA), 800 mg a daySome evidence
  • Fibre-type prebiotics (inulin, galacto-oligosaccharides, arabinogalactan) in his morning drinkPersonal habit
  • Ashwagandha and rhodiolaPersonal habit
  • Blueprint's own multi-ingredient capsules and antioxidant softgelsPersonal habit
  • Collagen powder; he suggests 20–30 g a day for skin and hairPersonal habit

Mike Israetel

No specific guidance in what we reviewed.

Sleep & recovery

Bryan Johnson

  • Fixed early schedule: in bed about 8:30 pm, up about 4:30 amStrong evidence
  • Screens off and a 60-minute wind-down before bedSome evidence
  • No caffeine for 8–10 hours before sleepSome evidence
  • Bright light soon after waking and dim red or amber light in the eveningSome evidence
  • Dry sauna at about 79 °C for 20 minutes dailySome evidence
  • Tracks sleep with a wearable and aims for a very low resting heart rate before sleepPersonal habit

Mike Israetel

No specific guidance in what we reviewed.

Stress & mind

Bryan Johnson

  • Uses a fixed routine so daily health choices do not depend on willpowerPersonal habit
  • Breathwork or reading as part of the evening wind-downSome evidence

Mike Israetel

No specific guidance in what we reviewed.

Weak spots to know

Bryan Johnson

  • His results come from one person doing many things at once, so it is hard to tell which part works. Scientists including Nir Barzilai (Nature, republished by Scientific American, 2026), who said science can't rest on a single person, and Morgan Levine (quoted in Vice, reported by Lifespan.io, 2023) have made this point.
  • His 'speed of ageing' and biological-age figures come from epigenetic clocks and biomarker comparisons. Researchers such as Steve Horvath have noted that some of these clocks predict health outcomes less well than others, and none is yet proven as a measure of whether a treatment extends life.
  • Several therapies he has tried, such as young-donor plasma and rapamycin, he later dropped himself. The US FDA has warned that young-plasma infusions have no proven benefit and may cause harm.

Mike Israetel

  • Most of his content is aimed at bodybuilders and younger lifters; advice for people over 40 is a smaller part of it.
  • Many specific numbers, such as when to take easy weeks or how fast to add sets, are coaching rules of thumb rather than findings from trials.
  • He sells training programmes and diet products through RP, the company he co-founded.

Build a plan from Johnson, Israetel 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.

Questions

What is the main difference between Bryan Johnson and Mike Israetel?

Their training split differs most in strength: Johnson about 30%, Israetel about 65% (our estimate from their published routines). Johnson's signature habit is Sleep-first, measure everything; Israetel's is 2 × 30 min, close to failure.

How much protein do Johnson and Israetel recommend?

Johnson: ~130 g a day. Israetel: No fixed target.

Whose advice has stronger evidence?

We rate the evidence behind Israetel's protocol higher: solid, against mixed for Johnson.

Do Johnson and Israetel disagree?

Not directly in what we reviewed. Their differences are in emphasis: israetel puts more of the week into strength: about 65% against 30%.

Can I combine Johnson and Israetel?

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

Full sources are on each profile: Bryan Johnson · Mike Israetel. Reviewed October 2026.