Comparison
Melatonin vs NMN
Melatonin
Pineal hormone regulating circadian rhythm. Low doses (0.3-1mg) often outperform higher doses for sleep.
NMN
Nicotinamide mononucleotide — NAD+ precursor. Studied for cellular aging and metabolic health.
| Field | Melatonin | NMN |
|---|---|---|
| Category | neuroprotective | neuroprotective |
| Dose range | 0.3–3mg | 250–1000mg |
| Half-life | 1h | — |
| Onset | 30min | — |
| Evidence | EVIDENCEA | EVIDENCEB |
| Safety | ●●●●● | ●●●●● |
| Legal (US) | USOTC | USOTC |
| PubMed refs | 28000 | 600 |
The comparison in plain English
Auto-generated from dataMelatonin and NMN are both in the neuroprotective category respectively. Melatonin Pineal hormone regulating circadian rhythm. NMN Nicotinamide mononucleotide — NAD+ precursor.
Bottom line
Melatonin (evidence A, safety 5/5) has a weaker evidence base than NMN (evidence B, safety 5/5). Melatonin has the slightly cleaner safety profile. For users new to either, the higher-evidence option is the safer first try.
Choose Melatonin if
Melatonin is the better fit when your goal aligns with its mechanism (Endogenous hormone produced by the pineal gland in response to darkness, signalling the circadian sleep window) and the dose range (0.3–3mg) suits your protocol. Half-life is 1h.
Choose NMN if
NMN is the better fit when your goal aligns with its mechanism (Direct precursor to NAD+ — one biosynthetic step closer than nicotinamide riboside, bypassing the NRK1/NRK2 enzymatic step) and the dose range (250–1000mg) suits your protocol. Half-life is —h.