Sources & Editorial Standards
How we research a fast-moving supplement category without turning marketing into medicine.
Sources used for this guide
- 2025 systematic review/meta-analysis of randomized NMN trials (PubMed)
- Review of NMN effects on glucose and lipid outcomes (PubMed)
- 250 mg/day randomized trial in healthy adults (PubMed)
- Randomized trial in older adults (PubMed)
Product details are checked against current merchant information. Health claims are evaluated separately against independent research.
Evidence hierarchy
For health outcomes we prefer systematic reviews, randomized controlled trials and other human evidence. Mechanistic, animal and cell research can provide context but is labeled accordingly. Product facts are checked against current merchant pages and COAs where available.