Source comparison
Best NAD+ Dosage for Sirtuin Activation: Product Comparison
Sublingual NMN 250–500mg daily NMN → NAD+ (1-step via NMNAT) 60–90 minutes 90 min – 4 hours post-dose Bypasses hepatic first-pass; highest peak tissue NAD+ Best for acute SIRT1/SIRT3 activation studies; fasted-state required Oral NR (nicotinamide riboside) 300
This comparison does not assign a generated winner or score.
- Sublingual NMN
- 250–500mg daily
- NMN → NAD+ (1-step via NMNAT)
- 60–90 minutes
- 90 min – 4 hours post-dose
- Bypasses hepatic first-pass; highest peak tissue NAD+
- Best for acute SIRT1/SIRT3 activation studies; fasted-state required
- Oral NR (nicotinamide riboside)
- 300–600mg daily
- NR → NMN → NAD+ (2-step)
- 2–4 hours
- 4–6 hours post-dose
- Survives gastric acid; stable hepatic metabolism
- Best for sustained NAD+ elevation; more forgiving of fed-state dosing
- Liposomal NMN
- 200–400mg daily
- NMN → NAD+ (1-step, enhanced absorption)
- 45–75 minutes
- 75 min – 3.5 hours
- Phospholipid encapsulation increases intestinal uptake
- Highest bioavailability per mg; cost premium of 40–60% vs standard NMN
- Extended-release niacin
- 500–1000mg daily
- Niacin → NAD+ via Preiss-Handler pathway
- 6–8 hours
- Unclear. Insufficient sirtuin-specific data
- Avoids flushing but very slow NAD+ delivery
- Not recommended for sirtuin research. Too slow to create ratio spike
- NAD+ IV infusion
- 250–500mg per session
- Direct NAD+ delivery (no conversion)
- Immediate (15–30 min)
- 30 min – 2 hours
- 100% bioavailable but rapid degradation by CD38
- Expensive ($200–400/session); short activation window limits utility