NAD+ is a critical coenzyme for cellular energy, DNA repair, and mitochondrial health. But levels drop with age, driving fatigue and metabolic decline. Can dietary supplements that act as precursors to NAD+, like NMN or NR, help?
The Evidence
Human trials: oral NAD+ precursors reliably boost NAD+ levels at doses of 300–1,000 mg/day. Studies show improved insulin sensitivity, reduced inflammation, and better physical endurance.
Caveats: short-term safety is established, but long-term risks (e.g., cancer growth in predisposed individuals) need more research.
Practical Tips
Choosing trusted brands that are third-party tested.
Pairing supplementation with lifestyle habits that naturally support NAD+ production, such as exercise or fasting.
Tracking NAD+ levels (via blood tests) and adjust regimens based on energy, cognitive function, and recovery.
The Verdict
NAD+ boosters show real promise, but they’re not a magic bullet. For now, NMN appears to be a viable option for enhancing energy and metabolic function, but longer-term human trials are needed to confirm its anti-aging potential. Stay informed, prioritize quality brands, and consult your doctor, especially if you have a cancer history.
Sources: Damgaard, M. V., & Treebak, J. T. (2023). What is really known about the effects of nicotinamide riboside supplementation in humans. Science advances, 9(29), eadi4862.