Peter Attia's Supplement Stack: What He Takes and What the Evidence Says

• Who is Peter Attia?
• What supplements does Peter Attia take?
• His reported daily supplement stack
• Why he takes each supplement
• Diet and nutrition habits
• Exercise, sleep and lifestyle routine
• The scientific evidence behind the stack
• Risks, limitations and what is actually confirmed
• How to build a sensible routine of your own
• Related Welzo products and guides
• Frequently asked questions
• References

Who is Peter Attia?

Peter Attia is a physician and author whose work on longevity has reached a very large audience. Understanding his background matters, because the credibility people attach to his supplement routine rests almost entirely on it.

Medical training and career

According to his own website, Attia received his medical degree from Stanford University School of Medicine and trained for five years in general surgery at the Johns Hopkins Hospital. He then spent two years at the National Institutes of Health as a surgical oncology fellow at the National Cancer Institute, where his research focused on immune-based therapies for melanoma. He is the founder of Early Medical, a practice built around what he calls "Medicine 3.0", and he lists medical licences in Texas, California and New York.

Books, podcast and public reach

Attia is the author of Outlive: The Science and Art of Longevity, a number one New York Times bestseller, and hosts The Peter Attia Drive, a podcast his site reports has passed 100 million downloads. Much of what the public knows about his personal routine comes from the subscriber-only "Ask Me Anything" episodes of that podcast, where he answers listener questions in detail.

What changed in 2026

Any honest article about Attia written in 2026 has to address the following, because it directly affects how his supplement recommendations should be read.

In February 2026, Attia's name appeared frequently in a release of documents relating to Jeffrey Epstein. NBC News reported that Attia issued a public apology for the correspondence, stated he had not been involved in any criminal activity, and said he had never visited Epstein's island. Authorities have not accused him of any crime. In the days that followed he parted company with several commercial partners: an AG1 spokesperson confirmed to NBC News that he was no longer an advisor to the company, he stepped down as chief science officer at the protein bar company David, and CBS News pulled a scheduled rerun of a 60 Minutes segment featuring him before he left the network.

Two practical consequences follow. First, almost every "Peter Attia supplement list" currently ranking on Google still describes AG1 as a supplement he takes and a company he advises. That is out of date. Second, and more importantly, this is a useful reminder of a principle Attia himself argues: an intervention should be judged on its evidence, not on the reputation of the person recommending it. That is the approach this article takes throughout.

What supplements does Peter Attia take?

How this list was compiled — and its limits

Attia has never published a definitive, dated list of what he takes. What exists in public is a patchwork: comments in podcast episodes, interview answers, and second-hand accounts written up by other sites. Several of those accounts trace back to podcast episodes recorded three or four years ago.

This matters for a health article. Below, every item is labelled by how well it is actually established:

• Confirmed: stated by Attia on his own website or in a directly quotable public appearance.
• Reported: attributed to him by secondary sources citing specific podcast episodes, but not verifiable on his own platforms.
• Historic: reported at some point in the past, with no evidence it remains current.

What Attia himself says about copying his stack

Attia is consistently reluctant to publish a list, and the reason is the substance of his argument rather than modesty. In AMA #85, released in May 2026, he sets out a framework built on defining the problem before choosing the molecule. His position is that a decision to take something should include a measurable metric, a target threshold, a time horizon, and an honest answer to the question of what happens if you do nothing. Without those, he argues, people convince themselves something worked on the basis of one good night's sleep or one improved lab value. As he puts it in that episode: "Poor problem definition almost guarantees some sort of false positive."

In other words, the list below is the least useful part of his approach. The framework is the useful part.

His reported daily supplement stack

The table summarises what has been publicly reported. Dosages are as described by secondary sources unless marked otherwise, and should be read as indicative rather than as a protocol.

Complete stack at a glance

A note on the aspirin entry

Several long-standing articles list daily low-dose aspirin as part of Attia's routine, based on old interviews. Major guidelines have moved away from routine aspirin for primary cardiovascular prevention in adults without established disease, because bleeding risk offsets the benefit in many people. Do not start aspirin on the basis of a celebrity supplement list. That is a decision for your doctor.

Why he takes each supplement

Omega-3 fatty acids

Attia has discussed fish oil repeatedly, including in AMA #69, where he assessed it alongside creatine, vitamin D, B vitamins and ashwagandha. The reported rationale is not a fixed dose but a target: adjusting intake against a blood measure of omega-3 status rather than guessing. EPA and DHA have authorised roles in normal heart and brain function, and this is one of the better-studied ingredients in the stack.

Vitamin D

The reported approach is again to dose to a blood level rather than to a pill count. It is worth separating two claims here. Correcting a genuine deficiency has clear benefits for bone and muscle health. Taking higher doses in people who are already replete, in the hope of preventing cancer or heart disease, is a different claim — and one the evidence does not currently support (see the evidence section).

Magnesium

Attia devoted an entire AMA (#54) to magnesium, covering deficiency, how to assess it, and the different available forms. His broad argument is that benefit from supplementation scales with how deficient you were to begin with — which is a sensible way to think about most micronutrients, and the opposite of "more is better".

Creatine monohydrate

Creatine is arguably the best-evidenced supplement in the entire stack. It has decades of human data for strength and power output, an excellent safety record in healthy adults, and a growing but less mature literature on cognitive effects. Attia has discussed it publicly as one of the few supplements with a favourable risk-to-reward profile.

Protein powder

This is less a supplement than a convenience food. Attia's practice recommends a protein intake far above the standard RDA — his site describes targeting around 2 g per kilogram of body weight, against an RDA of 0.8 g/kg — on the grounds that preserving muscle mass into later life is one of the highest-leverage things a person can do. Powder is simply a practical way to hit that number.

The sleep and evening group

Glycine, magnesium L-threonate and ashwagandha are reported as an evening routine. This is the weakest-evidenced cluster in the stack. Human trial data are small, short, and often industry-funded. Ashwagandha in particular carries a documented, if uncommon, signal for liver injury, and several European regulators have taken a cautious position on it.

The greens powder question

AG1 appears in every older list, usually alongside a disclosure that Attia was an investor and scientific advisor to the company. That relationship ended in February 2026. Independent of the reason it ended, the underlying evidence question was already contested: multi-ingredient greens powders have limited independent trial evidence for meaningful health outcomes in well-nourished adults, and they are expensive relative to a decent multivitamin.

Diet and nutrition habits

Protein is the organising principle

If there is one nutritional idea Attia is most associated with, it is protein adequacy. His site argues that the RDA of 0.8 g/kg is insufficient for building and maintaining muscle with age, and that most people under-consume it. Distributing intake across meals, rather than loading it into one, is the practical version of this.

A public change of mind on fasting

Attia spent years associated with ketogenic diets and extended fasting, and has since publicly revised his position — largely because of the difficulty of maintaining muscle mass and adequate protein intake while fasting. This is worth noting for a reason beyond nutrition: it is an example of a public figure changing a strongly held view in response to evidence, which is a reasonable marker of intellectual honesty.

Alcohol and energy balance

He has spoken about reducing alcohol intake and about the difficulty of managing body composition through diet alone. His broader framework treats nutrition as three levers — total calories, macronutrient distribution and timing — rather than as a branded diet to adopt.

Exercise, sleep and lifestyle routine

Attia is consistent that exercise, not supplementation, is the dominant lever. His site describes exercise as possibly the most potent "drug" available for extending both quality and quantity of life. If you take one thing from this article, take this section rather than the table.

The four pillars

His framework has four components: stability as the foundation, then strength, aerobic efficiency (zone 2), and anaerobic performance (zone 5). He defines zone 2 as the highest sustainable metabolic output while keeping blood lactate below 2 mmol/L.

VO2 max and mortality

Attia frequently cites cardiorespiratory fitness data showing a steep relationship with all-cause mortality. On his own site he describes moving from the bottom 25th percentile of VO2 max to the 25th–50th percentile as associated with roughly a 50% reduction in all-cause mortality, and moving from low to above average as closer to 70%. These are observational associations rather than proof of causation, but the effect size dwarfs anything attributable to a supplement.

The "Centenarian Decathlon"

This is his term for training backwards from the physical tasks you want to be able to perform in your final decade — lifting a suitcase overhead, getting off the floor unassisted, carrying a grandchild — and working out what capacity you need now to still have them then.

Sleep

Sleep sits alongside exercise in his hierarchy, well above supplements. The evening supplement group described earlier is best understood as marginal support layered on top of sleep behaviour, not a substitute for it.

The scientific evidence behind the stack

What the largest trial actually found

The VITAL trial is the most important piece of evidence for two of the biggest items in this stack. It was a randomised, double-blind, placebo-controlled trial of vitamin D3 at 2,000 IU per day and marine omega-3 fatty acids at 1 g per day, involving 25,871 US adults — men aged 50 and over and women aged 55 and over — followed for around five years, and published in the New England Journal of Medicine in 2019.

The result: neither supplement reduced the primary endpoints of major cardiovascular events or total invasive cancer. Some secondary and exploratory analyses were more encouraging — total myocardial infarction was lower in the omega-3 arm, with a larger apparent effect in participants who ate little fish — but secondary endpoints in a trial that missed its primary endpoints are hypothesis-generating, not conclusive.

This does not mean omega-3 or vitamin D are useless. It means the specific claim "healthy, well-nourished adults who take these will have fewer heart attacks and cancers" was tested at scale and not supported. Correcting a documented deficiency is a separate and much better-supported use case.

Evidence strength, ingredient by ingredient

UK guidance is more conservative than the stack

For readers in the UK, the reference point is not a Texas longevity clinic. NHS guidance is that everyone should consider a daily supplement containing 10 micrograms (400 IU) of vitamin D during autumn and winter, with certain groups — people with little sun exposure, those who cover their skin, and people of African, African-Caribbean or South Asian background — advised to take it year-round. The NHS also advises that adults and children aged 11 and over should not take more than 100 micrograms (4,000 IU) a day.

Risks, limitations and what is actually confirmed

What is confirmed versus reported

Confirmed by Attia's own platforms: his medical background; his four-pillar exercise framework; his high-protein position; his three-part framework for evaluating any supplement; his detailed public discussions of magnesium, creatine, fish oil, vitamin D, B vitamins and ashwagandha.

Reported by third parties only: essentially every specific dose in the table above. Treat those numbers as journalism about a person, not as a prescription.

Out of date: the AG1 entry and the aspirin entry, both of which still appear widely on other sites.

Safety issues worth taking seriously

• Anticoagulants and antiplatelets. High-dose omega-3 affects platelet function. If you take warfarin, a DOAC, clopidogrel or aspirin, speak to your doctor first.
• Kidney disease. Magnesium and creatine both depend on normal renal handling and should only be used on medical advice if kidney function is impaired.
• Vitamin B6. Sustained high doses can cause peripheral neuropathy. This is a real, documented harm, not a theoretical one.
• Ashwagandha. Rare but reported cases of liver injury. Avoid in pregnancy and in thyroid disease without medical advice.
• Vitamin D. Take particular care if you have a history of kidney stones, hypercalcaemia or sarcoidosis.
• Pregnancy and breastfeeding. Several items in this stack are not appropriate. Seek advice before starting anything.

Structural limitations of copying anyone's stack

Attia is a middle-aged, highly trained man with extensive biomarker testing, a physician's understanding of his own labs, and the resources to run repeated measurements. Almost none of that transfers. A stack calibrated to one person's blood results is not a protocol — and the person who designed it says so himself.

Conflicts of interest

Attia has historically maintained a public disclosures page, which is good practice. Commercial relationships existed with several supplement and nutrition companies, at least two of which ended in early 2026. When reading any influencer stack — including this one — check who is paid by whom. Welzo sells supplements, and you should weigh this article accordingly; that is why the evidence section above includes the trials that did not find benefit.

How to build a sensible routine of your own

Step one: define the problem, not the product

Borrow Attia's own framework. Write down the metric you want to change, the target, and the timeframe. "I want more energy" fails this test. "My ferritin is 12 µg/L and I want it above 30 within four months" passes it.

Step two: measure before you buy

Most long supplement stacks are the result of guessing. Testing usually shortens them. Relevant starting points are vitamin D status, an omega-3 index if you rarely eat oily fish, and — if fatigue is the presenting complaint — iron studies, thyroid function and B12, which explain tiredness far more often than any of the ingredients in this article.

Step three: start with the short list

For most healthy UK adults, an evidence-first core is short: vitamin D through autumn and winter at the NHS-recommended dose, adequate protein from food, creatine if you strength-train, and omega-3 if your oily fish intake is low. That is close to the whole list with good evidence behind it.

Step four: build the habit, then review it

Two anchor points in the day beat five. Re-test after an appropriate interval and stop anything that has not moved the metric it was meant to move. Attia's point about discontinuation is the one most people skip: a supplement you never re-evaluate is a subscription, not an intervention.

What to deprioritise

Multi-ingredient greens powders, NAD precursors, and most branded "longevity" blends have weak outcome evidence relative to their price. If budget is finite, spend it on food, a gym membership and a blood test before spending it on these.

Related Welzo products and guides

Where the evidence above supports a category, these are the relevant Welzo pages. Nothing here is a recommendation to take a specific product.

• Vitamin D supplements — including D3 at NHS-aligned doses and vegan options.
• Omega-3 supplements — with EPA and DHA content stated per serving.
• Magnesium supplements
• Multivitamins — a lower-cost alternative to greens powders.
• Brain and cognitive support supplements
• Guide: a minimal supplement stack for busy professionals
• Browse all supplements and vitamins

If you would rather measure than guess, Welzo runs at-home blood tests through UKAS and ISO-accredited partner laboratories, including vitamin D, omega-3 and magnesium testing.

Frequently asked questions

What supplements does Peter Attia take?

Reported items include omega-3, vitamin D3, several forms of magnesium, protein powder, creatine, folate and B12, glycine, ashwagandha and a probiotic, with melatonin and phosphatidylserine used for jet lag. He has never published an authoritative dated list, and most specific doses come from third-party write-ups of podcast episodes rather than from him directly.

How much omega-3 does Peter Attia take?

Secondary sources report roughly 2 g of combined EPA and DHA daily, adjusted against blood testing rather than fixed. The largest randomised trial of omega-3 supplementation, VITAL, used 1 g per day and found no reduction in major cardiovascular events or cancer in a general older population.

Does Peter Attia still take AG1?

AG1 appears in older lists alongside a disclosure that he was an investor and scientific advisor. An AG1 spokesperson confirmed in February 2026 that he was no longer an advisor to the company. His current personal use has not been publicly confirmed since.

What vitamin D dose does Peter Attia recommend?

He is reported to dose to a blood level of roughly 40–60 ng/mL rather than to a fixed number of IU. UK guidance is more conservative: the NHS advises 10 micrograms (400 IU) daily through autumn and winter for most adults, with an upper limit of 100 micrograms (4,000 IU) a day for adults and children aged 11 and over.

Is Peter Attia's supplement stack safe to copy?

Not without individual assessment. It contains items that interact with anticoagulants, items that require normal kidney function, and at least one — high-dose vitamin B6 — with a documented neuropathy risk. His routine is calibrated to his own repeated blood testing.

How much protein does Peter Attia eat?

His practice recommends around 2 g of protein per kilogram of body weight per day, roughly 1 g per pound, against an RDA of 0.8 g/kg. He argues most people under-consume protein and that this becomes more consequential with age.

What is zone 2 training and why does Attia emphasise it?

He defines zone 2 as the highest metabolic output you can sustain while keeping blood lactate below 2 mmol/L. It forms the aerobic pillar of his four-part framework alongside stability, strength and zone 5 anaerobic work.

Does Peter Attia take NMN or NAD boosters?

He has discussed NAD precursors publicly, including in AMA #84, and has generally been sceptical about the strength of the human outcome evidence. They do not feature as a core reported part of his own routine.

What is Peter Attia's framework for deciding whether to take a supplement?

Three questions: what is the objective, is there a biomarker to track it, and does the risk outweigh the reward. In AMA #85 he expands this to include defining a measurable metric, a target threshold, a time horizon, and the consequences of doing nothing.

What happened with Peter Attia in 2026?

His name appeared frequently in a February 2026 release of Epstein-related documents. He issued a public apology, said he had not been involved in criminal activity, and subsequently parted ways with AG1, the protein bar company David, and CBS News. Authorities have not accused him of any crime. It does not change the underlying evidence for any individual supplement, which is why this article assesses each ingredient on trial data rather than on endorsement.

References

1. Attia P. About Peter. peterattiamd.com.
2. Attia P. AMA #85: A guide to medications and supplements. The Peter Attia Drive, ep. #393, 25 May 2026.
3. Attia P. AMA #69: Scrutinizing supplements — creatine, fish oil, vitamin D and more. The Peter Attia Drive, ep. #340.
4. Attia P. AMA #54: Magnesium. The Peter Attia Drive, ep. #282.
5. Attia P. Protein. peterattiamd.com topic page.
6. Attia P. VO2 Max. peterattiamd.com topic page.
7. Manson JE, Cook NR, Lee I-M, et al. Vitamin D supplements and prevention of cancer and cardiovascular disease. N Engl J Med. 2019;380(1):33–44.
8. Manson JE, Cook NR, Lee I-M, et al. Marine n−3 fatty acids and prevention of cardiovascular disease and cancer. N Engl J Med. 2019;380(1):23–32.
9. Keaney JF, Rosen CJ. VITAL signs for dietary supplementation to prevent cancer and heart disease. N Engl J Med. 2019;380(1):91–93.
10. NHS. Vitamin D. Vitamins and minerals.
11. NBC News. Longevity doctor Peter Attia faces backlash over comments in Epstein files. February 2026.
12. TechCrunch. Peter Attia leaves David Protein. 3 February 2026.

Medical disclaimer: the information on Welzo.com is for general educational purposes and is not a substitute for professional medical advice, diagnosis or treatment. Always read the manufacturer's guidelines and consult a qualified healthcare professional before starting any over-the-counter product. If you take prescription medication, are pregnant or breastfeeding, or have kidney or liver disease, seek advice first.