Peter Attia MDScrutinizing supplements: creatine, fish oil, vitamin D, and more (AMA 69 Sneak Peek)
CHAPTERS
- 0:00 – 1:33
Preview of the supplement case studies
A montage of clips previews the supplements to be covered: creatine, fish oil, vitamin D, B vitamins and ashwagandha. Peter Attia hopes listeners can apply the framework to their own supplement lists.
- •Creatine may improve muscle performance by roughly 5-15%
- •Fish oil quality matters, as rancid products are common
- •Vitamin D is hard to equate with sun exposure
- •Ashwagandha has a history in traditional Indian medicine
- 1:33 – 3:12
Episode overview and why a framework beats "take this, don't take this"
The host explains that supplements vary greatly by person, so the episode offers a framework for evaluating them rather than blanket recommendations. Case studies will cover creatine, fish oil, vitamin D, B vitamins and ashwagandha.
- •Supplement use varies widely from person to person
- •Attia has never simply told people to take or avoid a supplement
- •The episode pairs a framework with case studies
- •The chosen supplements are ones the team is asked about often
- 3:12 – 7:34
How Attia audits patients' supplements and the supplement-vs-drug myth
Attia describes collecting all of a patient's medications and supplements, then mentally dumping everything and asking what should be added back. He challenges the idea of avoiding medicine while taking "natural" supplements, pointing to regulation differences and red yeast rice as an example.
- •Patients often can't say why they take a given supplement
- •Mental model: remove everything, then ask what to add back
- •Supplements are far less regulated than pharmaceuticals
- •High-dose red yeast rice acts like a modest dose of pravastatin
- •Any molecule should go through the same framework
- 7:34 – 11:16
The six-question framework for evaluating a supplement
Attia lays out the questions to ask about any supplement: deficiency versus supranormal levels, lifespan versus healthspan, a trackable biomarker, mechanism of action, and risk versus reward. He notes that not every question needs a yes and that supplement quality is a major concern.
- •Is it correcting a deficiency or targeting supranormal levels?
- •Is it for lifespan or healthspan, and which domain of healthspan?
- •Is there a biomarker to track the appropriate dose?
- •Mechanism of action is helpful but not essential
- •Risk-reward includes quality, which is worse in supplements than in pharma
- 11:16 – 13:41
Creatine: purpose, dosing, and healthspan goals
Creatine is taken to reach supraphysiologic levels, mainly for athletic performance, lean mass and possibly cognition. Muscle stores are saturated at 3-5 grams per day, and the old high-dose loading approach is no longer typical.
- •Used to achieve supraphysiologic levels, not to fix a deficiency
- •3-5 grams per day maximizes muscle stores
- •Older loading protocols used about 20 grams per day
- •No direct lifespan evidence; framed as a healthspan tool
- •Emerging data on cognitive decline
- 13:41 – 17:22
Creatine: biomarkers and mechanism of action
No commercially available biomarker tracks tissue creatine, so users follow a protocol. Attia explains how phosphocreatine regenerates ATP for short bursts of activity, and that cognitive effects are less certain because the brain takes up less creatine.
- •No commercial test for tissue creatine
- •Phosphocreatine donates phosphate to rebuild ATP
- •Relevant to short, intense efforts like a forty-yard dash
- •No proven aerobic benefit
- •Brain uptake is lower, so cognition may need higher doses
- 17:22 – 21:42
Creatine: efficacy data and potential benefits for women
Evidence suggests creatine improves power and hypertrophy by roughly 5-15%, with little benefit for endurance in trained athletes. Attia also discusses possible injury recovery and memory benefits, and why women may benefit more, including during hormonal transitions and an unclear picture in pregnancy.
- •Improves power and hypertrophy, partly via water retention in muscle
- •A meta-analysis found no endurance benefit in trained athletes
- •A recent review of 16 RCTs found a positive effect on memory
- •Women have lower stores and may benefit disproportionately
- •Pregnancy data are insufficient for a strong view
- 21:42 – 23:54
Creatine: risk versus reward, kidney caveats, and product choice
Attia rates creatine low risk with modest reward and robust safety data. People with imperfect kidney function should consult a doctor, since creatine can affect creatinine tests, and he recommends pure creatine monohydrate.
- •Low risk, modest reward category
- •Creatine can raise serum creatinine, confounding kidney tests
- •Patients with imperfect kidney function stop it for a couple of weeks before blood tests
- •Creatine monohydrate is the form to take
- •Choose a product with no fillers or extra ingredients
- 23:54 – 27:24
Fish oil: deficiency versus supranormal levels, and sneak peek wrap-up
The host begins the framework for fish oil, asking whether it corrects a deficiency or aims for supramaximal levels. The sneak peek then ends with a description of premium membership benefits.
- •Fish oil is a heavily asked-about supplement
- •The same framework questions are applied
- •The preview cuts off before Attia answers
- •Premium membership offers the full AMA and show notes
