Spermidine

Also known as: polyamine, wheat germ extract (spermidine-rich)

Grade B — Moderate Evidencepolyaminelongevity
1–2 mgWith food. Consistent daily use.

Spermidine is a naturally occurring polyamine found in aged cheese, wheat germ, and soybeans that induces autophagy — the cellular recycling process that declines with age. Observational studies link higher dietary spermidine intake with reduced cardiovascular mortality and improved cognitive function in the elderly. A small RCT demonstrated improved memory performance in older adults at risk of dementia. It is considered one of the more promising caloric restriction mimetics.

TL;DR: Autophagy inducer with strong epidemiological link to reduced all-cause mortality. RCT evidence for memory improvement in elderly.

🧬Longevity🧠Cognitive Performance❤️Heart Health
Last reviewed: 2026-03-12

Quick Facts

Evidence

Grade B

Studies

3

Interactions

0

Forms

1

Evidence Rating: Grade B — Moderate Evidence

Some RCTs with positive results, or strong observational evidence. More research may refine our understanding.

Important Notes

  • Food-equivalent doses; excellent safety
  • Wheat germ extract is most studied supplemental form
  • Also found in natto, mushrooms, aged cheese

Clinical Evidence (3 studies)

Higher dietary spermidine linked to lower all-cause mortality

Kiechl S et al. (2018) — Am J Clin Nutr

Large prospective cohort: lower mortality across spermidine intake thirds

View on PubMed

Spermidine improved memory in at-risk elderly

Wirth M et al. (2021) — Nat Aging

Supplementation improved memory in at-risk elderly; RCT

View on PubMed

Spermidine extended lifespan and reduced cardiac aging

Eisenberg T et al. (2016) — Nat Med

Extended lifespan in multiple species

View on PubMed

Alternatives to Consider

These supplements target similar goals and may be worth considering alongside or instead of Spermidine.

Resveratrol

Grade B

SIRT1 activator commonly combined with NMN/NR. Human evidence for metabolic improvement and cognitive support. Lipid-soluble — take with fat.

🧬 Longevity❤️ Heart Health🧠 Cognitive Performance

Taurine

Grade B

Conditionally essential amino acid. Landmark 2023 Science paper showed it extends healthy lifespan in multiple species.

🧬 Longevity❤️ Heart Health

NR (Nicotinamide Riboside)

Grade B

NAD+ precursor with strong human RCT evidence for NAD+ elevation. Unique cardiovascular benefits: reduced arterial stiffness and blood pressure.

🧬 Longevity❤️ Heart Health

Related Supplements

Resveratrol

Grade B — Moderate Evidence

SIRT1 activator commonly combined with NMN/NR. Human evidence for metabolic improvement and cognitive support. Lipid-soluble — take with fat.

Omega-3 Fish Oil

Grade A — Strong Evidence

Essential fatty acids with strong evidence for cardiovascular and mental health. EPA-dominant for mood; triglyceride form for absorption.

Pycnogenol

Grade B — Moderate Evidence

Patented French maritime pine bark extract with 400+ published studies. Evidence for cognitive function, cardiovascular health, and skin aging. Contains procyanidins similar to grape seed extract.

Taurine

Grade B — Moderate Evidence

Conditionally essential amino acid. Landmark 2023 Science paper showed it extends healthy lifespan in multiple species.

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⚕️ Important Disclaimer

This information is for educational purposes only. It is not medical advice. Always consult a healthcare provider before starting any supplement regimen, especially if you take medications or have health conditions.

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