Metformin vs NR
Head-to-head comparison of Metformin (Metformin Hydrochloride) and NR (Nicotinamide Riboside Chloride) — benefits, dosing, side effects, research data, and where to buy.
| Property | Metformin | NR |
|---|---|---|
| Category | Anti-Aging | Anti-Aging |
| Full Name | Metformin Hydrochloride | Nicotinamide Riboside Chloride |
| Molecular Weight | 165.63 Da | 290.69 Da |
| Half-Life | 4-8.7 hours | 1-3 hours |
| Amino Acids | N/A | N/A |
| Typical Dose | 500-2000 mg/day | 250-1000 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
NR Benefits
- ✓boosts NAD+ levels
- ✓supports DNA repair
- ✓supports mitochondrial energy metabolism
- ✓may improve insulin sensitivity
Metformin Dosing
500-2000 mg/day oral|start low and titrate in trials|taken with meals
NR Dosing
250-1000 mg/day orally|single or divided doses|often taken in the morning
Metformin Side Effects
- ⚠gastrointestinal upset
- ⚠vitamin B12 reduction
- ⚠diarrhea
- ⚠rare lactic acidosis
NR Side Effects
- ⚠nausea
- ⚠GI discomfort
- ⚠flushing uncommon
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.
NR
NR has substantial human and animal research showing reliable NAD+ elevation after oral dosing. Clinical outcomes are still being defined, but it is one of the better-studied longevity-related compounds.
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