Getting the right NAD+ dosage is crucial for effectiveness and safety. Here’s what the research says about optimal dosing for NMN, NR, and other NAD+ precursors.
General Dosing Guidelines
NMN (Nicotinamide Mononucleotide)
| Goal | Daily Dose | Timing | Form |
|---|---|---|---|
| General wellness | 250-500mg | Morning | Capsule or powder |
| Anti-aging | 500-1000mg | Morning | Capsule or sublingual |
| Athletic performance | 500-1000mg | Morning + pre-workout | Powder |
| Therapeutic | 1000-2000mg | Split AM/PM | Powder |
NR (Nicotinamide Riboside)
| Goal | Daily Dose | Timing | Form |
|---|---|---|---|
| General wellness | 250-300mg | Morning | Capsule |
| Anti-aging | 300-600mg | Morning | Capsule |
| Athletic performance | 300-600mg | Morning | Capsule |
| Therapeutic | 600-1000mg | Split AM/PM | Capsule |
Timing Recommendations
Best time to take NAD+ precursors: Morning
Reasons:
- NAD+ is involved in energy metabolism — taking it in the morning aligns with your body’s natural rhythm
- Some users report increased energy and alertness — taking it late may disrupt sleep
- NAD+ levels naturally peak in the morning — supplementation supports this cycle
On an empty stomach or with food?
- NMN: Can be taken either way. Some research suggests sublingual (under the tongue) on an empty stomach improves absorption
- NR: Can be taken with or without food. Food doesn’t significantly affect absorption
Dosing by Age
| Age Group | NMN Dose | NR Dose | Rationale |
|---|---|---|---|
| 25-35 | 250mg | 250mg | Preventive, NAD+ still relatively high |
| 35-50 | 500mg | 300mg | NAD+ declining, moderate supplementation |
| 50-65 | 500-1000mg | 300-600mg | Significant NAD+ decline, higher doses needed |
| 65+ | 1000mg | 300-600mg | Maximum NAD+ decline, consider higher doses |
Stacking Protocol
For maximum NAD+ optimization, consider this stack:
Morning (with breakfast):
- NMN: 500mg OR NR: 300mg
- TMG (Trimethylglycine): 500mg — supports methylation
- Resveratrol: 250-500mg — activates sirtuins
Why TMG? NAD+ precursors can deplete methyl groups. TMG replenishes them, preventing potential side effects like headaches or fatigue.
How to Know It’s Working
Short-term signs (1-2 weeks):
- Increased energy levels
- Improved mental clarity
- Better exercise recovery
Medium-term signs (1-3 months):
- Improved sleep quality
- Better skin appearance
- Enhanced physical performance
Long-term signs (3-6+ months):
- Slowed aging markers
- Improved bloodwork (NAD+ levels, inflammation markers)
- Sustained energy and vitality
Common Mistakes
❌ Taking too much too fast
Start with the lowest recommended dose and increase gradually. Some people experience mild nausea or headaches at high doses.
❌ Taking it at night
NAD+ precursors can be energizing. Taking them in the evening may cause insomnia or restless sleep.
❌ Not supporting methylation
If you’re taking NMN or NR daily, add TMG to prevent methyl depletion.
❌ Expecting instant results
NAD+ supplementation is a long-term investment. Give it at least 4-6 weeks before evaluating effectiveness.
❌ Buying cheap, untested products
Quality matters enormously. Cheap NMN/NR may be degraded, underdosed, or contaminated. Always buy from reputable brands with third-party testing.
Safety and Side Effects
NAD+ precursors are generally very safe:
- Common side effects: Mild nausea, headaches (usually at high doses)
- Rare side effects: Flushing, dizziness
- Serious side effects: None reported in clinical trials
Who should consult a doctor first:
- Pregnant or breastfeeding women
- People with cancer (NAD+ may theoretically support cancer cell metabolism)
- People on medications affecting NAD+ pathways