Fisetin vs Spermidine
Head-to-head comparison of Fisetin (3,3',4',7-Tetrahydroxyflavone) and Spermidine (Spermidine) — benefits, dosing, side effects, research data, and where to buy.
Research Score
| Property | Fisetin | Spermidine |
|---|---|---|
| Category | Anti-Aging | Anti-Aging |
| Full Name | 3,3',4',7-Tetrahydroxyflavone | Spermidine |
| Molecular Weight | 286.24 Da | 145.25 Da |
| Half-Life | 3-8 hours | N/A |
| Amino Acids | N/A | N/A |
| Typical Dose | 1000-2000 mg/day | 1-6 mg/day |
| Route | Oral | Oral |
| Purity | ≥98% | ≥98% |
| Studies Count | 180 | 250 |
| Research Status | Pre-clinical | Clinical |
Fisetin Benefits
- ✓senolytic activity
- ✓reduces inflammatory signaling
- ✓supports mitochondrial function
- ✓may improve healthspan
Spermidine Benefits
- ✓autophagy induction
- ✓mitochondrial quality control
- ✓cardiometabolic support
- ✓healthspan association
Fisetin Dosing
1000-2000 mg/day orally|1-2 days per month in senolytic-style studies|take with a fat-containing meal
Spermidine Dosing
1-6 mg/day oral|daily supplementation protocols|dietary intake from food sources
Fisetin Side Effects
- ⚠GI upset
- ⚠headache
- ⚠possible blood-thinner interaction
Spermidine Side Effects
- ⚠GI upset
- ⚠bloating
- ⚠nausea
- ⚠odor changes
Research Overview
Fisetin
Preclinical studies show fisetin can selectively target senescent cells and reduce age-related inflammatory markers. Early human research exists, but definitive anti-aging outcomes in humans are still unproven.
Spermidine
Spermidine has meaningful preclinical support and a growing human observational literature linking intake with healthier aging metrics. Its core longevity mechanism is thought to involve autophagy and improved proteostasis.
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