Best Longevity Supplements (2025): Anti-Aging Evidence Review

Rankings Guide · 10 min read

Best Longevity Supplements: What Science Actually Supports

Longevity supplementation is one of the fastest-growing areas in health research, driven by discoveries in NAD+ biology, autophagy, and epigenetic aging. But most «anti-aging» supplements on the market have only animal study data. This guide focuses on supplements with emerging human clinical evidence for aging-related biomarkers — and is honest about the limits of current data.

1. NMN (Nicotinamide Mononucleotide): NAD+ Restoration

NAD+ (Nicotinamide Adenine Dinucleotide) is central to cellular energy production and DNA repair. NAD+ levels decline 50% by age 50. NMN is a direct precursor to NAD+ and the most studied NAD+ precursor in humans. A 2022 Japanese RCT found NMN supplementation (250mg/day) significantly increased blood NAD+ levels and improved muscle endurance in older adults. Multiple smaller trials show improvements in metabolic markers, insulin sensitivity, and subjective energy.

The longevity connection: Sirtuins (particularly SIRT1-7, the «longevity proteins») require NAD+ as a substrate. Restoring NAD+ levels reactivates sirtuin function, which regulates DNA repair, mitochondrial health, and inflammation.

Effective dose: 250–500mg NMN daily, ideally with apigenin (which inhibits CD38, an enzyme that depletes NAD+).

2. Berberine: The Metformin Alternative for AMPK Activation

AMPK (AMP-activated protein kinase) is one of the master regulators of cellular aging. Metformin — the longevity drug that has received the most research attention — works primarily through AMPK activation. Berberine activates AMPK through similar mechanisms and has been compared head-to-head with metformin in clinical trials, showing comparable effects on blood glucose and insulin sensitivity. The TAME trial (Targeting Aging with Metformin) is ongoing; berberine offers an OTC equivalent with accumulating evidence.

Effective dose: 500mg 3x/day with meals. Improves glucose tolerance, reduces LDL/triglycerides, activates autophagy.

3. Apigenin: CD38 Inhibition and NAD+ Protection

Apigenin (a flavonoid from parsley and chamomile) gained research attention as a CD38 inhibitor. CD38 is an enzyme that consumes NAD+ — one of the reasons NAD+ levels decline with age is that CD38 expression increases. By inhibiting CD38, apigenin helps preserve NAD+ levels independently of NMN/NR supplementation. Andrew Huberman popularized combining apigenin with NMN for this synergistic NAD+ preservation effect.

Effective dose: 50mg apigenin daily (standardized extract). Often combined with NMN/NR for synergistic NAD+ preservation.

The Honest Assessment: Animal vs Human Evidence

Most longevity supplements have strong animal model data and limited human evidence. Resveratrol famously extended lifespan dramatically in yeast, flies, worms, and mice — but human trials showed poor bioavailability and minimal effect. This is the key longevity supplement lesson: be cautious of extrapolating from animal studies. The supplements above (NMN, berberine, apigenin) have the most credible human data available as of 2025, but the field is still young.

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