Metformin vs Spermidine
Head-to-head comparison of Metformin (Metformin Hydrochloride) and Spermidine (Spermidine) — benefits, dosing, side effects, research data, and where to buy.
Research Score
| Property | Metformin | Spermidine |
|---|---|---|
| Category | Anti-Aging | Anti-Aging |
| Full Name | Metformin Hydrochloride | Spermidine |
| Molecular Weight | 165.63 Da | 145.25 Da |
| Half-Life | 4-8.7 hours | N/A |
| Amino Acids | N/A | N/A |
| Typical Dose | 500-2000 mg/day | 1-6 mg/day |
| Route | Oral | Oral |
| Purity | ≥98% | ≥98% |
| Studies Count | 4000 | 250 |
| Research Status | Clinical | Clinical |
Metformin Benefits
- ✓AMPK activation
- ✓improved insulin sensitivity
- ✓reduced oxidative stress
- ✓population-level longevity signal
Spermidine Benefits
- ✓autophagy induction
- ✓mitochondrial quality control
- ✓cardiometabolic support
- ✓healthspan association
Metformin Dosing
500-2000 mg/day oral|start low and titrate in trials|taken with meals
Spermidine Dosing
1-6 mg/day oral|daily supplementation protocols|dietary intake from food sources
Metformin Side Effects
- ⚠gastrointestinal upset
- ⚠vitamin B12 reduction
- ⚠diarrhea
- ⚠rare lactic acidosis
Spermidine Side Effects
- ⚠GI upset
- ⚠bloating
- ⚠nausea
- ⚠odor changes
Research Overview
Metformin
Metformin has extensive human data and remains a leading candidate in geroscience research. Observational and mechanistic studies suggest it may influence pathways tied to aging, though definitive anti-longevity proof in healthy humans is still lacking.
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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