NAD+ vs Spermidine
A side-by-side research comparison of NAD+ and Spermidine across mechanism, dosing, half-life, benefits, side effects and research status.
Comparison table
| Attribute | NAD+ | Spermidine |
|---|---|---|
| Full name | Nicotinamide Adenine Dinucleotide (NAD+ / NMN / NR) | Spermidine (Polyamine) |
| Category | Anti-Aging | Anti-Aging |
| Status | Research compound | Dietary compound (research ongoing) |
| Mechanism | NAD+ serves as cofactor for sirtuins (SIRT1-7), PARPs (DNA repair), and CD38. Declining NAD+ impairs mitochondrial function and epigenetic maintenance. Restoration reactivates longevity pathways. | Induces autophagy, partly by inhibiting acetyltransferase activity and mimicking caloric restriction signaling. This promotes clearance of damaged proteins and organelles, supporting cellular renewal, cardiovascular health, and cognition. |
| Molecular weight | 663.4 Da | 145.25 Da |
| Half-life | 1-4 hours (IV), 4-8h (oral precursors) | Short; rapidly absorbed and distributed |
| Bioavailability | 100% (IV), variable (oral 5-30%) | Oral absorption reported; also produced by gut bacteria |
| Typical dose | 250-500mg IV or 500-1000mg NMN oral | 1-10 mg per day |
| Frequency | Weekly (IV) or Daily (oral) | Once daily |
| Route | IV infusion or Oral (precursors) | Oral |
NAD+ reported benefits
- Restored cellular energy
- Enhanced DNA repair
- Sirtuin activation
- Improved mitochondrial function
- Cognitive clarity
- Anti-aging
Spermidine reported benefits
- Induces autophagy (cellular clean-up)
- Cardiovascular support
- Cognitive and memory support (research)
- May support hair and overall longevity
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Research and educational reference only. Not medical advice.