Spermidine
Other ·Exploratory record · not publication-reviewed ·Updated July 13, 2026
Spermidine is a naturally occurring polyamine found in human cells and many foods, best known in research for triggering autophagy, the cellular recycling process that declines with age. It is studied for longevity, cardiovascular, and memory-support outcomes, though most strong findings come from cell, animal, and observational human data rather than large efficacy trials. Supplements are usually concentrated wheat germ extracts standardized to a set spermidine content.
Exploratory record, not a reviewed medical publication.
See the editorial and medical-review policies for the publication gate.
This generated database record has not completed a claim-level review by a qualified human medical reviewer. Bibliography links and evidence labels are not approval. The page remains available for reference and is excluded from search indexing.
What the research says.
A quick, data-only summary. The full evidence, dosing, and sources are below.
Spermidine is an other most often used for cellular autophagy support, healthy aging and longevity focus, cardiovascular health support. NutriStack rates the overall evidence as emerging. A typical adult dose is 1-6 mg spermidine daily, commonly taken as standardized wheat germ extract providing a defined spermidine dose. This profile indexes 5 sources.
- Mild digestive upset
- Bloating
- Nausea (uncommon)
- Wheat or gluten allergy or celiac disease (wheat germ extracts)2
- Pregnancy and breastfeeding (insufficient safety data)
The bottom line
Evidence rating emerging. Most-documented uses: cellular autophagy support, healthy aging and longevity focus, cardiovascular health support. 5 sources indexed (2009–2022), with 0 interaction records on file.
How it works, mechanistically.
Core mechanism
Spermidine induces autophagy, in part by inhibiting the acetyltransferase EP300 and promoting deacetylation of autophagy-related proteins, which enhances clearance of damaged organelles and aggregated proteins. As a polyamine it also stabilizes nucleic acids and membranes, supports mitochondrial function, and is required for hypusination of the translation factor eIF5A. These mechanisms are well characterized in preclinical models; the extent to which oral dosing reproduces them in humans at supplement doses is still being established.5,1
Dosing & protocol.
Water soluble; commonly taken with food. Dietary and supplemental spermidine is absorbed in the gut, and gut microbiota also contribute to polyamine pools. Whole-food wheat germ matrices are the most studied delivery form.1
What it actually costs.
Real-world pricing across three quality tiers. Assumes Standardized wheat germ extract.
Price varies widely with the labeled spermidine content per serving; some products list extract weight rather than actual spermidine, so compare on milligrams of spermidine. Updated 2026-06-03.
Full safety detail.
Side effects
- Mild digestive upset
- Bloating
- Nausea (uncommon)
Sources, by evidence tier.
Numbered references. Citations throughout the page link here.
Randomized controlled trials
2- 1Effect of Spermidine Supplementation on Cognitive Function in Older Adults With Subjective Cognitive Decline: A Randomized Clinical TrialPMIDSchwarz C et al. · JAMA Network Open · 2022
In the SmartAge trial, 12 months of spermidine did not significantly improve memory versus placebo, though it was safe and well tolerated.
- 2Spermidine in dementia: Relation to age and memory performancePMIDSchwarz C et al. · Cortex / Aging (pilot reports) · 2018
A 3-month spermidine-rich wheat germ supplement was safe and well tolerated in older adults and showed signals of improved memory performance in a small pilot.
Observational studies
1- 3Higher spermidine intake is linked to lower mortality: a prospective population-based studyPMIDKiechl S et al. · American Journal of Clinical Nutrition · 2018
In the Bruneck cohort, higher dietary spermidine intake was associated with lower all-cause, cardiovascular, and cancer-related mortality.
Mechanistic & preclinical
2- 4Cardioprotection and lifespan extension by the natural polyamine spermidineSource linkedPMIDEisenberg T et al. · Nature Medicine · 2016
- 5Induction of autophagy by spermidine promotes longevityPMIDEisenberg T et al. · Nature Cell Biology · 2009
Spermidine induced autophagy and extended lifespan in yeast, flies, worms, and human cells, with autophagy required for the effect.
Common questions.
Quick answers about Spermidine, drawn from the data on this page.
What is Spermidine?
Spermidine is a naturally occurring polyamine found in human cells and many foods, best known in research for triggering autophagy, the cellular recycling process that declines with age. It is studied for longevity, cardiovascular, and memory-support outcomes, though most strong findings come from cell, animal, and observational human data rather than large efficacy trials. Supplements are usually concentrated wheat germ extracts standardized to a set spermidine content.
What is Spermidine used for?
Commonly cited benefits of Spermidine include: Cellular autophagy support; Healthy aging and longevity focus; Cardiovascular health support; Memory and cognitive support; Hair and follicle support. NutriStack rates the overall evidence as emerging.
What is a typical dose of Spermidine?
A typical adult dose of Spermidine is 1-6 mg spermidine daily. The commonly recommended form is Standardized wheat germ extract providing a defined spermidine dose. These are general ranges, not personalized advice; confirm the right dose with a clinician.
What are the side effects of Spermidine?
Reported side effects include mild digestive upset, bloating, nausea (uncommon). This is educational information; check with a healthcare professional before use.
How strong is the evidence for Spermidine?
NutriStack rates this as Emerging, meaning early RCT signal, mechanistic data, or limited human evidence. Full tier criteria are at https://nutristackapp.com/methodology/evidence-tiers.
Use this with your stack
Spermidine in NutriStack.
Add it to your stack, see how it interacts with everything else you take, and get a Stack Score that updates the moment it does.