Compound Library

Supplement / Longevity

Spermidine

Polyamine naturally found in wheat germ, aged cheese, and mushrooms. Induces autophagy. Associated with increased lifespan in animal models and reduced cardiovascular mortality in human cohort studies.

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Educational reference only. This page does not diagnose, prescribe, or replace care from a licensed professional. Laws, availability, and clinical appropriateness vary by location.
Reference dose1–5 mg/day (wheat germ extract 1.2–2.4 mg/day clinically studied)
Half-life1 hours
Risk flaglow
Regulatory noteReview required

Side effects and watch-outs

  • Generally very well tolerated at dietary doses
  • GI upset at high doses
  • Limited long-term clinical intervention data
  • Wheat germ extract form may cause GI discomfort in gluten-sensitive individuals