Longevity Supplement Stack Guide

The single most common question we get: what supplements should I actually take? The answer is more boring than the supplement industry wants you to believe. Most "anti-aging" supplements have weak or no human evidence. The ones that work reliably are few, well-studied, and mostly inexpensive.

This guide is our evidence-based, prioritized longevity supplement stack — what to take, in what dose, at what time, in what combinations, and (equally important) what to skip. We assume you've already optimized the lifestyle fundamentals (exercise, sleep, diet, stress). Supplements layer on top of those, not instead of them.

Principles: how to think about supplement stacks

Five principles shape our approach:

1. Lifestyle first. No supplement stack compensates for sedentary lifestyle, poor sleep, or ultra-processed diet. The fundamentals are 80% of the result. Supplements are the last 20% — and probably less.
2. Evidence over marketing. We require human evidence, not just animal or test-tube data. We're skeptical of novel compounds with limited human use.
3. Less is more. Each supplement adds cost, complexity, and potential interactions. A short stack of high-evidence supplements beats a long stack of marginal ones.
4. Dose to test. For supplements where blood testing is available (vitamin D, omega-3 index, magnesium RBC), dose to your individual results, not a generic recommendation.
5. Cost-benefit. A $200/month stack that produces 1% improvement is worse than a $30/month stack that produces 5% improvement. Marginal returns matter.

Tier 1: Foundational (almost everyone)

The Tier 1 stack is for healthy adults of any age who want to optimize basic nutrient status. These have broad human evidence and are inexpensive.

• Vitamin D3 + K2. Vitamin D deficiency is widespread; adequate levels are associated with lower cancer, autoimmune, and metabolic disease. Dose to maintain 40–60 ng/mL blood levels — typically 2,000–5,000 IU/day, but varies widely. Pair with K2 (MK-7, 100 mcg) to direct calcium into bones. See our D3/K2 guide.
• Omega-3 (EPA + DHA). If you don't eat small oily fish 2–3 times per week, supplement. Target 1–2 g combined EPA+DHA daily. Strong evidence for cardiovascular and cognitive health. See our omega-3 guide.
• Magnesium glycinate. Most adults are mildly deficient; magnesium is involved in 300+ enzymatic reactions. 200–400 mg/day, ideally glycinate (well-absorbed, calming). See our magnesium guide.
• Protein (if needed). Most adults under-eat protein, especially as they age. Aim for 1.0–1.6 g/kg/day, with 25–40g per meal. Whey or plant protein powder can fill gaps.

Cost: ~$30–50/month. Evidence: very strong for each. Risk: very low.

Tier 2: Targeted longevity (adults 40+)

The Tier 2 stack adds targeted longevity compounds for adults 40+ who have optimized Tier 1 and lifestyle. These have stronger longevity-specific evidence but more nuance.

NMN (or NR) + Resveratrol. The Sinclair stack (see our Sinclair list). NMN restores declining NAD+ levels (see our NAD+ explainer). Resveratrol activates sirtuins. Combined, they target the NAD+/sirtuin axis. NMN: 500–1,000 mg/day, morning. Resveratrol: 500–1,000 mg/day, morning with fat. We like the combined OMRE product for convenience.

Magnesium glycinate (sleep dose). Already in Tier 1, but doubles as a sleep aid when taken in the evening. 200–400 mg, 30–60 min before bed. See our sleep guide.

Omega-3 (higher dose for longevity). Tier 1 baseline is 1–2g EPA+DHA. For longevity purposes (lowering inflammation, supporting brain health), some practitioners go to 2–4g/day. Monitor with an omega-3 index test (target >8%). Nordic Naturals Ultimate Omega is our top pick.

Apigenin. A flavonoid (found in chamomile, parsley, celery) with growing evidence for sleep support and possible senolytic activity. 50 mg in the evening, 30–60 min before bed. Pairs well with magnesium glycinate. See our apigenin guide.

Creatine monohydrate. Not just for bodybuilders. 5g/day has evidence for muscle preservation (especially important with age), cognitive function, and possibly bone density. Cheap, well-studied, well-tolerated. See our creatine guide.

Cost: ~$120–180/month total (Tier 1 + Tier 2). Evidence: moderate to strong. Risk: low.

Tier 3: Experimental / specific indications

Tier 3 is for advanced practitioners or specific indications. These have less human evidence, more nuance, or specific use cases.

• Spermidine. Induces autophagy; strong animal data, growing human evidence. 1–10 mg/day. See our spermidine guide.
• Astaxanthin. Potent antioxidant (carotenoid); evidence for skin, eye, and oxidative stress. 4–12 mg/day.
• Fisetin (senolytic protocols). Flavonoid with senolytic activity (clears senescent cells). Used in periodic protocols (e.g., 1,000 mg/day for 2 consecutive days, monthly). Evidence is preliminary.
• Quercetin + dasatinib (senolytic). Dasatinib is a prescription cancer drug; the combination is being studied for senescent cell clearance. Strictly experimental.
• Rapamycin (prescription). Off-label low weekly doses; see our rapamycin guide.
• Metformin (prescription). Off-label for non-diabetics with metabolic concerns; see our metformin guide.
• Adaptogens (ashwagandha, rhodiola). Stress support; evidence is moderate. See our adaptogens guide.
• CoQ10. Especially if taking a statin (which depletes CoQ10). 100–200 mg/day.
• Curcumin. Anti-inflammatory; needs enhanced absorption formulation (e.g., Meriva, Theracurmin).
• Greens powders, collagen peptides, hyaluronic acid. Mostly marketing; minor evidence. Skip or use as desired.

Timing: when to take what

Timing matters more than people think. Some compounds are stimulating (take morning), some are calming (take evening), some need to be taken with food (fat-soluble). Here's the framework:

Take prescription drugs (rapamycin, metformin, statins) per physician instructions, often with meals.

Stacking: which combinations make sense

Some combinations are synergistic; others cancel each other out or create risks. The combinations we like:

• NMN + resveratrol (or pterostilbene). The Sinclair stack. NMN raises NAD+; resveratrol activates sirtuins that use NAD+. Synergistic.
• Magnesium glycinate + apigenin. For sleep. Magnesium supports GABA; apigenin binds benzodiazepine receptors mildly. Synergistic for sleep onset and depth.
• Omega-3 + vitamin D3 + K2. All fat-soluble; take together with a fat-containing meal. D3 needs K2 for proper calcium direction; omega-3 improves absorption.
• Creatine + protein + carbohydrate. Post-workout, for muscle protein synthesis. Creatine absorption may be slightly enhanced with carbs.
• NMN + spermidine. NAD+ restoration + autophagy induction — hitting two aging hallmarks.

Combinations to avoid or be careful with:

• Multiple stimulants (caffeine + synephrine + yohimbe, etc.) — cardiovascular risk.
• Multiple blood thinners (aspirin + omega-3 + ginkgo + vitamin E + nattokinase) — bleeding risk.
• High-dose antioxidants around exercise — can blunt exercise adaptations (similar to metformin concern). Take antioxidants away from training.
• Iron + calcium + coffee/tea — calcium and polyphenols inhibit iron absorption. Separate by 2+ hours.
• St. John's wort + most prescription drugs — strong CYP3A4 inducer; reduces effectiveness of many drugs.

What to skip: popular but weak-evidence supplements

The supplement industry is full of compounds with great marketing and weak human evidence. Here's what we'd skip (or take only for specific indications):

• Acai, goji, mangosteen, noni, and other "superfruit" extracts. Marketing-driven; eat real berries instead.
• Resveratrol at low doses (<500 mg). Below 500 mg, you're probably not getting a meaningful sirtuin effect.
• "Anti-aging" multi-level-marketing products. Almost universally overpriced and under-evidenced.
• Homeopathic preparations. No active ingredient; no evidence beyond placebo.
• Branched-chain amino acids (BCAAs) if you eat adequate protein. Redundant.
• Glutamine (unless you have specific gut or immune issues). Weak evidence for general use.
• Testosterone boosters (herbal). Largely ineffective; if you have low T, see a doctor for actual TRT.
• "Detox" supplements and cleanses. Your liver and kidneys detoxify you. Save the money.
• Multi-vitamins with 50+ ingredients at sub-therapeutic doses. Better to take fewer, targeted supplements at effective doses.
• Novel "NAD+ boosters" with no published human data. Stick with NMN or NR — the evidence-based NAD+ precursors.

Sample stacks by age and goal

Sample stack for a healthy 30-year-old (Tier 1 only):

• Vitamin D3 + K2 (2,000–5,000 IU, dose to blood test)
• Omega-3 (1–2 g EPA+DHA)
• Magnesium glycinate (200–400 mg, evening)
• Protein powder (if needed to hit 1.2–1.6 g/kg/day)
• Cost: ~$30–40/month

Sample stack for a healthy 50-year-old (Tier 1 + Tier 2):

• NMN 500 mg (morning)
• Resveratrol 500 mg (morning, with fat)
• Vitamin D3 + K2 (dose to blood test)
• Omega-3 (2 g EPA+DHA)
• Magnesium glycinate 400 mg (evening)
• Apigenin 50 mg (evening)
• Creatine 5 g (anytime, consistent)
• Cost: ~$120–150/month

Sample stack for a 60-year-old optimizing for longevity (Tier 1 + Tier 2 + selective Tier 3):

• All Tier 2 above
• Spermidine 3–5 mg/day
• Astaxanthin 8–12 mg/day
• CoQ10 100–200 mg/day (especially if on a statin)
• Discuss rapamycin or metformin with a longevity-focused physician
• Cost: ~$180–250/month (plus prescription costs if applicable)

Safety and interactions

Most supplements at typical doses are very safe, but a few principles:

• Tell your physician everything you take — supplements can interact with prescription drugs (St. John's wort and CYP3A4 drugs is the classic example).
• Be cautious with blood thinners — omega-3, vitamin E, ginkgo, nattokinase, and aspirin all have anticoagulant effects; combining with prescription blood thinners needs medical oversight.
• Cycle stimulants — caffeine, synephrine, yohimbe. Tolerance builds; cardiovascular risk with overuse.
• Watch for heavy metals in cheap supplements — especially calcium, iron, and protein powders from less-reputable brands. Look for third-party testing (NSF, USP, ConsumerLab).
• Pregnancy and breastfeeding — most supplements haven't been tested; stick with prenatal vitamins + omega-3 unless cleared by your OB.
• Track side effects — start one new supplement at a time, give it 1–2 weeks, and stop if you experience adverse effects.

Measuring whether your stack is working

The biggest mistake people make with supplement stacks: taking them for years without measuring whether they're working. We recommend:

• Annual comprehensive blood panel — including vitamin D, B12, magnesium RBC, omega-3 index, hs-CRP, lipids, HbA1c, fasting insulin, hormonal panel.
• Annual DEXA scan — body composition, visceral fat, bone density.
• Annual or bi-annual biological-age test — DunedinPACE or PhenoAge. See our tests guide.
• Continuous wearable tracking — sleep, HRV, resting HR, VO2 max estimate. See our wearables guide.
• Periodic VO2 max testing — in a lab every 1–2 years.

If you take a supplement for 12 months and see no measurable improvement in any relevant marker, stop taking it. Supplements aren't a religion — they're a tool, and tools that don't work should be discarded.

The bottom line

A good longevity supplement stack is small, evidence-based, and dosed to individual needs. Tier 1 (vitamin D, omega-3, magnesium, protein) covers almost everyone. Tier 2 (NMN, resveratrol, apigenin, creatine) is reasonable for adults 40+ who have optimized lifestyle. Tier 3 (spermidine, astaxanthin, prescription drugs) is for advanced practitioners or specific indications. Skip the marketing-driven "anti-aging" multi-supplements and the 50-pill stacks — they're mostly noise.

For the broader framework, see our beginner protocol, our guide to lowering biological age, and our healthspan vs lifespan guide. For specific protocols, see our Sinclair list, our Blueprint decode, and our Outlive summary.