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Spermidine
Natural polyamine that induces autophagy — cellular cleanup — and is associated with longevity in observational studies.
What the evidence says
Spermidine helped in about half (2/4) of the studies that measured an effect — promising, but not unanimous.
Most evidence is from high-quality randomised trials published 2009–2026 with a typical study size of 37 participants.
Based on 23 studies · 13 RCTs · 2,520 total participants
Confidence
HighWhat the studies found
By outcome
Spermidine has an evidence score of 8/10 — strong evidence based on 23 indexed studies, including 2 meta-analyses. Natural polyamine that induces autophagy — cellular cleanup — and is associated with longevity in observational studies.
The commonly studied dose of Spermidine is 1-5mg (or wheat germ extract equivalent). Research points to an estimated optimal dose around 4mg, with a minimum effective dose near 2mg. Individual response varies — start low and adjust.
The best time to take Spermidine is in the morning. Taking it with food is preferred. Spermidine is a naturally occurring polyamine that induces autophagy — the cellular self-cleaning process.
Alpha Lipoic Acid
Likely helpsUniversal antioxidant that works in both water and fat, supporting blood sugar control, nerve health, and cellular energy.
Resveratrol
Likely helpsPolyphenol found in red wine and grapes, studied for its potential anti-aging and cardiovascular benefits through sirtuin activation.
Last reviewed May 2026 · evidence from 38 studies · how we score
This information is for educational purposes only. It is not a substitute for professional medical advice. Always consult a qualified healthcare provider before starting, stopping, or changing any supplement or medication.
Spermidine is a polyamine found in aged cheese, mushrooms, legumes, and wheat germ. It's one of the most promising longevity compounds due to its ability to induce autophagy — the cellular process that clears damaged proteins and organelles. Epidemiological studies link higher spermidine intake with reduced mortality and cardiovascular disease.
Triggers cellular cleanup processes
May affect gene expression patterns
How Spermidine works — from molecular targets to health outcomes. Click an edge to see supporting research.This visualization is in beta — pathways are being refined and expanded.
1-5mg (or wheat germ extract equivalent)
Can be taken without food
| Form | Type |
|---|---|
| 💊Wheat germ extract standardized to spermidine | Recommended |
| 💊Synthetic spermidine | Alternative |
| 💊Food sources (aged cheese, mushrooms) | Alternative |
Wheat germ extract is the most studied supplemental form. Pure spermidine supplements are also available.
Minimum: 4 weeks
Optimal: weeks
Cycling: Not required
Note: Can be taken any time. Some prefer morning to align with natural circadian autophagy rhythms.
Based on single small RCT (n=44) showing endothelial function improvement. Limited data on direct spermidine supplementation effects. Most evidence comes from indirect polyamine production studies.
Enhanced autophagy and cellular cleanup
May support heart health
Dietary amounts safe; supplementation not studied
Consult oncologist — polyamines have complex role in cancer
Generally well-tolerated
Tip: Reduce dose
Spermidine is generally well-tolerated and considered safe for most healthy adults at recommended doses. The most commonly reported side effects are mild GI effects. Use caution if any of these apply to you: Cancer (theoretical concern — polyamines may support cancer cell growth).
Fisetin
Likely helpsFlavonoid with potent senolytic properties, may clear damaged cells and support healthy aging.
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