What is the most important supplement in Peter Attia's stack?

Vitamin D3 is arguably foundational, particularly because so many people are deficient and it has roles in immune function, bone health, and metabolic regulation. However, Attia emphasizes that the "most important" supplement is the one addressing your specific deficit. Testing baseline levels is essential before determining priorities.

Does Peter Attia recommend NAD+ boosters like NMN or NR?

Attia has discussed NAD+ precursors as mechanistically interesting compounds—sirtuins and PARPs are plausibly involved in aging—and small trials suggest metabolic benefits. However, he is explicit that human longevity data are preliminary. He may include them in his personal regimen but typically presents them as experimental rather than proven interventions.

What's the difference between magnesium forms, and why does Attia prefer glycinate?

Magnesium glycinate is chelated to glycine, which improves intestinal absorption and reduces laxative effects compared to oxide, citrate, or carbonate forms. Attia's preference reflects attention to bioavailability—you absorb more of what you take, making the supplement more effective. Glycinate also provides glycine, which has its own mechanistic benefits.

Can I take all these supplements together, or do some interact?

Most of Attia's foundational stack (vitamin D, magnesium, omega-3s, B vitamins) can be taken together. However, calcium and magnesium may compete for absorption if taken simultaneously, and iron should be separated from calcium and polyphenol-rich foods. If you're on medications (especially statins, anticoagulants, or antiplatelets), discuss supplementation with your doctor, as some compounds can interact.

How long does it take to see benefits from this supplement stack?

Biomarker shifts (vitamin D levels, omega-3 index, magnesium status) typically appear within 8–12 weeks at consistent dosing. Subjective benefits—improved sleep, energy, exercise recovery—may emerge within weeks for some people, particularly if correcting a deficiency. Longevity-scale benefits (cellular health, reduced aging rate) are not measurable in individuals on typical timescales.

Is Peter Attia's supplement stack safe for everyone?

Foundational micronutrients are generally safe at recommended doses for most adults. However, individual factors matter: kidney disease affects magnesium and mineral dosing; blood-clotting disorders contraindicate aspirin; certain medications interact with supplements. Baseline testing and discussion with a healthcare provider are essential, particularly if you have chronic conditions or take medications.

Peter Attia Supplement List: Evidence-Based Longevity Stack

Peter Attia, a longevity physician and prominent voice in preventive medicine, has publicly discussed a curated supplement regimen focused on healthspan—the number of healthy years lived—rather than lifespan alone. His approach is grounded in mechanistic understanding, bioavailability, and emerging evidence, prioritizing foundational nutrients before adding experimental compounds. This article reviews the key supplements in his publicly discussed stack, the evidence behind them, and how to evaluate whether they fit your own health goals.

What Defines a Longevity-Focused Supplement Stack

A longevity supplement stack differs from a general multivitamin in both scope and intention. Rather than filling micronutrient gaps broadly, it targets specific pathways implicated in aging: mitochondrial function, oxidative stress, inflammation, and metabolic resilience. Attia's approach exemplifies this precision.

Longevity stacks typically layer compounds into tiers: foundational micronutrients (vitamin D, magnesium, B vitamins), then metabolic supports (omega-3s, CoQ10), and finally experimental agents (NAD+ precursors, senolytics). The goal is not to "cheat" aging but to optimize the conditions under which your body's repair systems—autophagy, mitochondrial turnover, DNA repair—can function optimally.

Foundational Micronutrients in Attia's Approach

Vitamin D3 is a cornerstone. Attia emphasizes testing baseline 25-hydroxyvitamin D levels before supplementing. Vitamin D3 supplementation is supported by mechanistic evidence: vitamin D receptors regulate immune tolerance, bone mineralization, and calcium homeostasis. Observational studies link higher vitamin D status to lower mortality risk, though randomized trials (VITAL, D-Health) have shown more modest effects on overall mortality and disease risk. Most evidence supports maintaining levels of 40–60 ng/mL for general health; some longevity practitioners target 50–80 ng/mL, though optimal levels remain debated.

Magnesium plays roles in over 300 enzymatic reactions. Attia's preference for magnesium glycinate reflects attention to bioavailability—the glycine chelate form is absorbed more efficiently and less likely to cause gastrointestinal distress than oxide or carbonate forms. Typical doses range 200–400 mg daily. Mechanistically, magnesium supports mitochondrial ATP production, reduces inflammation, and promotes sleep quality, all relevant to longevity. Evidence is observational rather than interventional; deficiency is associated with metabolic dysfunction, but high-dose supplementation in replete individuals hasn't shown dramatic lifespan effects in humans.

B Vitamins, particularly B6, B12, and folate, support one-carbon metabolism and homocysteine regulation. Elevated homocysteine is associated with cardiovascular risk, though lowering it pharmacologically hasn't consistently reduced event rates. Attia's stack likely includes adequate B vitamins through diet or a targeted B-complex; supplementation is straightforward and low-risk.

Metabolic Support and Cardiovascular Health

Omega-3 Fatty Acids (EPA and DHA) are central to Attia's regimen. Omega-3 supplementation, particularly in triglyceride or phospholipid forms (rather than ethyl esters), offers better bioavailability. EPA and DHA support cardiac rhythm, endothelial function, and brain health. While large trials (VITAL, STRENGTH) showed modest overall benefits in primary prevention, secondary prevention trials and mechanistic studies support their role, especially at adequate doses (1–2 g combined EPA+DHA daily). Attia's approach emphasizes quality and form—expensive but absorbable formulations over cheap commodity fish oil.

Coenzyme Q10 (CoQ10) supports mitochondrial electron transport and ATP synthesis. Statin users deplete CoQ10, making supplementation mechanistically rational for that population. In healthy individuals, evidence for lifespan extension is lacking, but preliminary data suggest benefits for endothelial function and exercise capacity. Ubiquinol (reduced form) is better absorbed than ubiquinone; doses of 100–300 mg daily are typical.

Aspirin and Low-Dose Lithium sometimes appear in Attia's public discussions. Low-dose aspirin (75–100 mg daily) is supported for secondary prevention and has emerging data in primary prevention, though benefit-risk balance is individualized. Lithium, discussed in some longevity circles, has mechanistic appeal (GSK3β inhibition, mitochondrial support) but limited human safety data at supplemental doses; Attia has been cautious about recommending it without rigorous biomonitoring.

Emerging and Experimental Compounds

Glycine is increasingly featured in longevity discussions. Glycine supplementation (3–5 g daily) supports collagen synthesis, mitochondrial function, and may improve sleep quality. Mechanistically, it's a limiting amino acid for glutathione synthesis, a critical antioxidant. A small randomized trial suggested glycine plus NAC improved metabolic parameters in subjects with metabolic syndrome, but robust human longevity data are lacking. Its safety profile is excellent, and Attia has included it as a low-risk, mechanistically sound addition.

NAD+ Precursors (NMN, NR) are popular in Attia's circles. NAD+ is essential for sirtuins and PARPs, proteins implicated in aging and cellular stress responses. Animal models show life-extension and metabolic benefits from NAD+ restoration. However, human evidence is preliminary. Small trials suggest nicotinamide mononucleotide (NMN) may improve metabolic measures and muscle function, but no randomized trials have demonstrated human lifespan extension. Attia likely includes these as mechanistically justified but explicitly unproven interventions.

Methylene Blue is an older compound experiencing renewed interest. Methylene blue has antioxidant and mitochondrial-supporting properties—it can donate electrons to the electron transport chain. Preliminary data suggest cognitive benefits at low doses (10–20 mg daily), though human evidence remains sparse. Attia has discussed it cautiously, acknowledging the interesting mechanism but the limited human validation. Higher doses can cause side effects (blue urine, GI upset), and drug interactions are possible.

Rapamycin and other mTOR inhibitors have appeared in some longevity protocols, though not universally promoted by Attia. While mechanistically interesting (mTOR inhibition promotes autophagy and extends lifespan in model organisms), human data are extremely limited, and long-term risks unknown. Most practitioners approach these cautiously.

Individual Variation and Testing

A core theme in Attia's public teaching is that supplementation without baseline testing is shooting in the dark. He emphasizes comprehensive bloodwork before starting a stack: vitamin D, magnesium (red blood cell magnesium), B12, folate, omega-3 index, homocysteine, inflammatory markers (hsCRP), lipid panel, and metabolic markers (fasting glucose, insulin, HbA1c).

This testing serves two purposes. First, it identifies actual deficiencies or imbalances that supplementation can address. Second, it enables tracking—rechecking key biomarkers after 8–12 weeks of consistent supplementation to confirm that your regimen is having the intended effect. Someone with a vitamin D level of 65 ng/mL may not need supplementation; someone at 20 ng/mL clearly does. This personalization separates a rationally targeted approach from generic "longevity stack" marketing.

Dosing, Timing, and Bioavailability Considerations

Attia's framework prioritizes bioavailability and form. For example, magnesium glycinate is chelated for absorption; synthetic magnesium oxide is cheap but poorly absorbed and laxative. Fish oil in triglyceride form is absorbed at higher rates than ethyl ester forms, justifying the higher cost. Vitamin D3 is fat-soluble, so taking it with a fat-containing meal improves absorption. CoQ10 is similarly fat-soluble.

Timing and spacing matter. Some practitioners separate calcium and magnesium supplementation by several hours to avoid competition for absorption, though the evidence supporting this is mixed. Iron and calcium both compete for absorption; if supplementing both, separate them. Aspirin and NSAIDs together increase GI bleeding risk. These details seem granular but reflect the precision Attia applies to the stack.

Typical daily supplementation might look like: vitamin D3 (1000–2000 IU, adjusted based on blood levels), magnesium glycinate (200–400 mg, ideally split between morning and evening), omega-3s (1–2 g EPA+DHA), CoQ10 (100–200 mg), B-complex or individual B vitamins, glycine (3–5 g, often in evening to support sleep), and conditionally, NAD+ precursors, methylene blue, or others. The exact regimen is personalized.

Evidence Strength and Honest Uncertainty

It's important to acknowledge what the evidence does and doesn't show. Vitamin D, magnesium, and omega-3s have mechanistic plausibility and observational support; their roles in broad health are defensible. Randomized trials have been more equivocal, particularly in primary prevention and for overall mortality. NAD+ precursors, methylene blue, and glycine are supported by mechanism and preliminary data but lack the robust human evidence of older compounds.

Attia is generally transparent about this hierarchy. Foundational nutrients are evidence-based and low-risk. Middle-tier compounds (CoQ10, omega-3s) have mechanistic and observational support. Experimental compounds are included for mechanistic rationale with the explicit caveat that human longevity data are limited. This honesty—distinguishing proven benefits from speculative ones—is what separates Attia's approach from unsubstantiated marketing.

Who Is This Stack For, and Practical Next Steps

Attia's supplement regimen is designed for health-conscious adults interested in optimizing aging. It's not a "hack" or shortcut—diet, exercise, sleep, and stress management remain the foundation. Supplements are adjuncts.

If you're interested in adopting a similar approach: (1) Start with baseline bloodwork. Identify actual deficiencies. (2) Layer in foundational micronutrients first—vitamin D, magnesium, basic B vitamins. (3) Retest after 8–12 weeks to confirm benefit. (4) Only add experimental compounds if you understand the evidence (or lack thereof) and have discussed them with a knowledgeable clinician. (5) Prioritize quality and bioavailability over cost-cutting. A smaller dose of a well-absorbed form beats a larger dose of a poorly absorbed one.

Longevity is not determined by supplements alone. Attia's own longevity approach emphasizes structured exercise, metabolic health via diet, cognitive engagement, and sleep. Supplements are a supporting layer, not the foundation.