The evidence-based approach to supplements, lifestyle, and biomarkers โ tailored to your age, goals, and budget. No hype, no vendor affiliate lists.
The longevity space in 2026 is both more exciting and more dangerous than it's ever been. More exciting because partial reprogramming just entered human trials, and several Tier 1 interventions have been proven to extend healthy lifespan in mammals. More dangerous because the influencer supplement space is louder than ever, selling hope with zero regard for drug interactions, individual biology, or age-appropriate dosing.
This guide cuts through both. The goal: help you build a protocol that's appropriate for your specific situation โ not a copy of someone else's stack.
TL;DR: Start with the foundation layer (applies to everyone). Add advanced layer at 35+. Only add frontier interventions if you have physician oversight and understand the risks. Always track biomarkers to know if anything is working.
The same intervention can be beneficial or harmful depending on three variables:
This is why "the Sinclair stack" or "the Attia protocol" is not your protocol โ it was designed around their specific biology, age, and goals. Use their research as input, not as output.
| Tier | Definition | Confidence | Examples |
|---|---|---|---|
| Tier 1 | Human RCT evidence, replicated | High | Exercise, caloric restriction, Metformin, rapamycin (in older adults) |
| Tier 2 | Strong animal models + human observational | Moderate | NMN/NR, spermidine, fisetin, alpha-ketoglutarate, taurine |
| Tier 3 | Mechanistically compelling, early human data | Low-Moderate | OSK reprogramming (IND approved), GDF-11, young plasma |
These four interventions have the strongest evidence base of any longevity intervention. If you're not doing these, adding any other supplement is noise.
VO2 max in the top quartile for your age = 4ร lower all-cause mortality versus the bottom quartile. Nothing โ not rapamycin, not NMN, not any supplement โ comes close to this effect size. The protocol: 150-180 min/week Zone 2 cardio + 3-4 sessions resistance training/week. This alone adds ~7-10 quality-adjusted life years according to multiple cohort studies.
Chronic short sleep (<6hrs) increases Alzheimer's risk 30%, cardiovascular mortality 26%, and cancer risk 40%. You cannot supplement your way out of bad sleep. Target: 7-9hrs, consistent wake time (more important than total time), cool room (65-68ยฐF), no alcohol within 3hrs of bed.
54% of adults are deficient. Deficiency is associated with dramatically higher all-cause mortality, cancer risk, and cognitive decline. Target serum 25(OH)D of 50-70 ng/mL. Most people need 4,000-6,000 IU daily to hit this range (get tested to know yours). Always pair with K2 (100-200mcg MK-7) to direct calcium to bones, not arteries.
REDUCE-IT trial (2018): 4g/day EPA reduced cardiovascular mortality 25% in high-risk patients. For longevity, 2-3g combined EPA+DHA daily. Triglyceride form (not ethyl ester) absorbs 70% better. Algae-based preferred if you want to avoid heavy metal concerns in fish oil.
Cost for foundation layer: ~$50/month. Before spending on NMN, rapamycin, or any expensive supplement, confirm you have this foundation covered. The effect size gap between Tier 1 lifestyle and any Tier 2 supplement is enormous.
These add meaningfully to a solid foundation but aren't replacements for it.
NAD+ precursors. Animal data is compelling (lifespan extension in multiple models). Human data: bioavailability confirmed, NAD+ levels increase, some functional improvements in small trials. Sinclair takes 1g NMN daily; Brenner (inventor) takes 300mg NR. Dosing unclear. 500-1000mg NMN or 300-500mg NR is reasonable. Works synergistically with exercise (don't skip Tier 1 for this).
Autophagy inducer. Strong observational data: higher dietary spermidine โ lower cardiovascular mortality (PREDIMED cohort). Mechanistic: induces autophagy via mTOR-independent pathway. 10-15mg/day supplement. Wheat germ and aged cheese are natural sources.
Technically well-understood metabolic support. Underrated for longevity: strong evidence for muscle preservation, emerging evidence for cognitive protection, and possibly neuroprotective. 5g/day. Cheapest intervention on this list with one of the best evidence profiles.
New addition to the evidence base: 2023 Science paper showed taurine deficiency drives aging, and supplementation extends lifespan in mice. Sinclair added 2g/day in 2026 update. Very low risk. 1-3g/day.
Critical cofactor for 300+ enzymatic reactions. Most people are deficient. Sleep quality, insulin sensitivity, cardiovascular health all improve with repletion. 300-400mg elemental magnesium before bed.
Currently the most compelling anti-aging pharmaceutical in mammals. Life extension in mice: 25-60% depending on study. Human data: the Dog Aging Project showed cardiac improvement in older dogs. Human trial PEARL is ongoing. Protocol: 5-6mg once weekly (avoiding daily dosing to preserve mTORC2). Requires physician prescription. Potential issues: immunosuppression, infection risk, may blunt some vaccine responses. Not appropriate under age 45-50 in most protocols.
Anti-aging evidence: TAME trial ongoing. Observational data shows diabetic patients on metformin outliving non-diabetic controls not taking it. Mechanism: AMPK activation, mTOR suppression, mitochondrial effects. Important caveat: reduces exercise adaptation (blunts mitochondrial biogenesis response). Consider cycling off training weeks. 500-1000mg with evening meal.
๐จ Dasatinib + Quercetin (D+Q) โ REMOVED from protocols
This popular senolytic combination (kills senescent cells) was in many protocol lists as of 2025. A March 2026 study found D+Q causes myelin damage in mice. Until human data clarifies this, we recommend avoiding this combination. Fisetin (single senolytic) remains Tier 2 with better safety profile.
โ ๏ธ GLP-1 Agonists (Ozempic/Semaglutide) โ Use with resistance training
GLP-1 agonists show impressive epigenetic age reduction and CV mortality benefits. But they also cause significant lean mass loss (muscle). Without concurrent resistance training 4ร/week and 1g protein/lb lean mass, GLP-1 longevity benefits are likely net negative. Don't use for longevity without the full protocol.
Protocols without measurement are hope, not science. Minimum annual tracking:
For advanced tracking (annual): epigenetic age test (DunedinPACE or Horvath clock), DEXA body composition scan, full lipid panel with LDL-P and ApoB.
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Generate My Protocol โRelated: Longevity Research Hub 2026 ยท Protocol Generator ยท Censavudine ARPA-H Trial