Spermidine vs Urolithin A
Head-to-head comparison of Spermidine (Spermidine) and Urolithin A (Urolithin A) — benefits, dosing, side effects, research data, and where to buy.
Research Score
| Property | Spermidine | Urolithin A |
|---|---|---|
| Category | Anti-Aging | Anti-Aging |
| Full Name | Spermidine | Urolithin A |
| Molecular Weight | 145.25 Da | 228.20 Da |
| Half-Life | N/A | N/A |
| Amino Acids | N/A | N/A |
| Typical Dose | 1-6 mg/day | 250-1000 mg/day |
| Route | Oral | Oral |
| Purity | ≥98% | ≥98% |
| Studies Count | 250 | 120 |
| Research Status | Clinical | Clinical |
Spermidine Benefits
- ✓autophagy induction
- ✓mitochondrial quality control
- ✓cardiometabolic support
- ✓healthspan association
Urolithin A Benefits
- ✓mitophagy activation
- ✓muscle endurance support
- ✓mitochondrial health
- ✓cellular cleanup
Spermidine Dosing
1-6 mg/day oral|daily supplementation protocols|dietary intake from food sources
Urolithin A Dosing
250-1000 mg/day oral|daily capsule dosing in studies|single daily dose protocols
Spermidine Side Effects
- ⚠GI upset
- ⚠bloating
- ⚠nausea
- ⚠odor changes
Urolithin A Side Effects
- ⚠nausea
- ⚠GI discomfort
- ⚠headache
- ⚠bloating
Research Overview
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.
Urolithin A
Urolithin A has both animal and human data showing effects on mitochondrial biomarkers and physical performance-related endpoints. It is one of the more promising mitochondrial-targeted longevity compounds in current literature.
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