Longevity Supplements: The Honest List — What's Proven and What's Overhyped
30 longevity compounds ranked by evidence — from strongly supported (omega-3, vitamin D, creatine) to overhyped (resveratrol, the NMN hype). An honest assessment, not marketing.
"Which supplements are actually worth it?" is the most-asked question in longevity — and the worst-answered. Most lists online follow a "more is better" logic and sell hope. We do it differently: this list ranks 30 compounds by level of evidence — honestly, even when the answer is uncomfortable.
Every entry links to its detail page in our compound database, with study counts, dosing, and caveats. A serious academic reference for research on lifespan-extending substances is the DrugAge database (see sources) — we see ourselves as its consumer-friendly, evidence-graded complement.
Important: No supplement replaces the basics — sleep, exercise, nutrition, social connection. Supplements are the finishing touch, not the foundation. And much of it is overrated in healthy people. When in doubt, measure your bloodwork rather than swallowing blindly.
How we grade the evidence
| Tier | Meaning |
|---|---|
| 🟢 strong | Several good human studies / meta-analyses, consistent effect |
| 🟡 moderate | Solid data, but limited or mixed |
| 🟠 emerging | Promising, but mostly animal / early-phase data |
| 🔴 preliminary | Fascinating hypothesis, weak human evidence |
The evidence traffic light: all 30 compounds
🟢 Strongly supported — the foundation (7)
| Compound | For what |
|---|---|
| Vitamin D3 + K2 | Bone, immunity, mortality in deficiency |
| Omega-3 (EPA/DHA) | Cardiovascular, inflammation, brain |
| Magnesium glycinate | >300 enzymes, sleep, muscle |
| Creatine monohydrate | Muscle, bone, increasingly cognition |
| Zinc | Immunity, hormones, wound healing |
| Selenium | Thyroid, antioxidant enzymes |
| Olive oil polyphenols | Vessels, inflammation (Mediterranean) |
🟡 Moderate — solid additions (13)
| Compound | For what |
|---|---|
| Coenzyme Q10 | Mitochondria, heart, statin support |
| Berberine | Blood sugar, lipids ("natural metformin") |
| Alpha-lipoic acid | Blood sugar, diabetic neuropathy |
| Turmeric (curcumin) | Inflammation, joints |
| NAC | Glutathione precursor, antioxidant |
| Green tea | Catechins, cardiovascular |
| Coffee | Mortality, metabolism (polyphenols) |
| Caffeine | Alertness, performance (see caution block) |
| Glycine | Sleep, collagen, GlyNAC |
| Ashwagandha | Stress, cortisol |
| Rhodiola | Stress resilience, fatigue |
| Probiotics | Gut microbiome |
| L-lysine | Essential amino acid, herpes |
🟠 Promising but young (9)
| Compound | For what |
|---|---|
| NMN · NR | NAD⁺ rise proven, healthspan benefit open |
| Spermidine | Autophagy |
| Fisetin · Quercetin | Senolytics (zombie cells) |
| Taurine | Mortality in animal models (Singh 2023) |
| Matcha | Concentrated green tea (few own studies) |
| L-glutamine | Gut/immune — muscle hype overrated |
| Oregano oil | Antimicrobial |
🔴 Overhyped — handle with care (1)
| Compound | Why |
|---|---|
| Resveratrol | Sirtuin classic, but weak human evidence & poor bioavailability |
The foundation: where the money is well spent
If you take only five things, take these — well supported, cheap, low risk: Vitamin D3+K2, Omega-3, Magnesium, Creatine, and — depending on bloodwork — Zinc. This is also the core of our basics stack. Everything else is fine-tuning.
Mitochondria & NAD: the longevity engine room
This is where the most exciting research — and the most hype — lives. CoQ10 is solid (especially on statins), alpha-lipoic acid for metabolism. The NAD⁺ precursors NMN and NR demonstrably raise NAD⁺ in humans — but whether that means measurably healthier aging is still open. Honestly: promising, not proven.
Senolytics & autophagy: cleanup at the cellular level
Fisetin and Quercetin aim to clear senescent "zombie cells", spermidine to boost autophagy — more in the pieces on senolytics and fasting & autophagy. Mechanistically strong, human evidence still young.
Overhyped — handle with care
Honesty matters — these four are routinely oversold:
- Resveratrol: The Sinclair classic. Many cell/animal studies, but disappointing human data and poor bioavailability. Not essential.
- The NMN hype: NAD⁺ rises — human lifespan is not proven. Intriguing, but pricey for an unclear benefit.
- Isolated caffeine: The longevity benefits of coffee/tea come from the polyphenols, not the caffeine. Caffeine pills ≠ coffee.
- Glutamine for muscle: Weakly supported in healthy people. More useful for gut/immune.
How to build a stack from this
- Foundation first (strongly supported): D3+K2, omega-3, magnesium, creatine — daily.
- Add deliberately by need and bloodwork: zinc, CoQ10 (statins), berberine (blood sugar), ashwagandha (stress).
- Experimental (optional, eyes open): NMN/NR, spermidine, fisetin — with realistic expectations.
For a concrete example, see my personal stack. And all the details, doses, and study counts are in the compound database.
Bottom line
The honest truth: a handful of compounds are strongly supported and cheap — the rest ranges from "solid" through "promising" to "overhyped". Get the foundation right and stay realistic about the rest, and you capture 90% of the benefit. More pills ≠ a longer life. Better decisions do.
- [1]DrugAge / Human Ageing Genomic Resources — database of lifespan-extending compounds
- [2]PubMed search: omega-3 & all-cause mortality (meta-analyses)
- [3]PubMed search: creatine — muscle & cognition (meta-analyses)
- [4]PubMed search: vitamin D supplementation & mortality
- [5]PubMed search: NMN / NR — NAD⁺ rise in humans (clinical trials)
- [6]PubMed search: resveratrol — clinical trials (mixed results)
- [7]PubMed search: spermidine & autophagy / longevity
