other · for afternoon energy crash
NMN
Raises NAD, which your cells use to keep energy production ticking over.
Say that in clinical terms
NAD+ boosts sirtuin activity and mitochondrial efficiency, sustains cellular energy production.
How strong is the research?
Solid evidence
Only one studyStudied in a narrower group
1 paper read, 1 supporting.
Who was studied: The cited study could not be found, so who was in it is unknown.
How much to take
daily
250–500 mg
Morning dosing supports sustained energy throughout the day.
Before you take it
- No NIH ODS Tolerable Upper Intake Level (UL) established for NMN; NIH ODS has no dedicated NMN fact sheet. Human trials have administered up to 1,250 mg/day for 4 weeks and 900 mg/day for 12 weeks without serious adverse events reported, but long-term safety data beyond 12–24 weeks are lacking.
- NMN is structurally distinct from nicotiamide (niacinamide) and nicotinic acid; the IOM/NIH UL of 35 mg/day for nicotinic acid (niacin flush form) does not apply to NMN. NMN does not bind GPR109A and does not cause flushing at typical doses.
- Preclinical signals (mouse studies including a 2025 AACR abstract) indicate elevated NAD+ may support proliferation in some cancer types (e.g., UV-induced skin cancer model); this has not been demonstrated in human trials to date, but the signal warrants caution in individuals with active or recent malignancy pending human data.
- No safety data in pregnancy or lactation; NMN should be avoided in these populations until reproductive safety studies are available.
- No published drug interaction studies exist for NMN; interactions with medications are unknown.
- Multiple senior NMN researchers hold patents or patent-licensing agreements with commercial NMN manufacturers (MetroBiotech USA, Teijin Japan), creating systemic conflict-of-interest across much of the published human trial literature.
What we make of it
The study cannot be found, so neither can its participants.
The detail
The identifier we stored returns nothing in any database, so we cannot confirm the paper exists or that 66 people took part. And an afternoon energy crash is not something any NMN trial has measured.