The Best Longevity Supplement Stack in 2026: What I Actually Take and Why
Most longevity stacks are marketing. Someone finds a study suggesting compound X extends lifespan in worms, another study showing compound Y improves mitochondrial function in mice, and suddenly they’re selling you a 15-ingredient blend that costs $300/month. None of them have actually tested the combination.
I’ve spent the last decade thinking about how to build an evidence-based supplement stack. And I’ve come to an uncomfortable conclusion: most supplements don’t work well enough to justify their cost if you’re also doing the basics. But some do. And there’s a rational way to tier them.
Tier System: How to Think About Evidence
Tier 1: Strong Human Evidence – Exercise, sleep, metabolic flexibility, stress management. These dwarf any supplement.
Tier 2: Strong Animal Evidence + Reasonable Human Data – Metformin, rapamycin.
Tier 3: Strong Animal Evidence + Limited Human Data – Fisetin, NAD+ precursors, urolithin A.
Tier 4: Plausible Mechanism + Limited Data – Spermidine, lithium orotate, alpha-ketoglutarate.
My Current Stack
Tier 1 Non-Negotiables: Exercise (150+ min/week), sleep (7-9 hours), metabolic flexibility, stress management.
Tier 2 Pharmacological: Metformin (500 mg daily), Rapamycin (5 mg weekly), NMN (250 mg daily).
Tier 3 Evidence-Based Experimentals: Fisetin (1,000 mg 3x/week), Urolithin A (500 mg daily).
Tier 4 Mechanistically Sound: Spermidine (1 mg daily), Lithium orotate (5 mg daily), Alpha-ketoglutarate (1 g daily).
What I Don’t Take (And Why)
I don’t take NMN + NR together (redundant). I don’t take high-dose niacin (adequate NAD+ from NMN). I don’t take senolytics beyond fisetin. I don’t take resveratrol or pterostilbene (poor bioavailability). I don’t take 15-ingredient longevity blends (marketing). I don’t take high-dose antioxidants (impair adaptive responses).
The Overall Strategy
My stack targets: metabolic optimization, mTOR regulation, cellular cleanup, and speculative but low-risk additions.
The Honest Truth
The difference between someone taking a perfect longevity stack and someone taking nothing is probably 5–15% lifespan extension if both do the fundamentals correctly. But the difference between someone who exercises, sleeps well, and manages metabolism versus someone who doesn’t is 30–50%. Supplements matter, but they matter less than you think.
Disclaimer: This article is for informational purposes only and is not medical advice. Consult your physician before starting any supplement regimen or taking prescription medications like metformin or rapamycin.