NMN/NR Dose Guide

Nicotinamide mononucleotide (NMN) and nicotinamide riboside (NR) are NAD+ precursors that have been studied for their potential role in cellular energy metabolism and aging biology. This tool shows the dose ranges used in published human clinical trials, scaled by body weight where relevant. It is a research reference guide only — not a dosing recommendation. Human research on NMN and NR is still early-stage, and long-term safety data are limited. Always consult a healthcare provider before starting any new supplement.

Reviewed by GetHealthyCalculators Editorial Team · Updated April 11, 2026

Quick Answer

Most human clinical trials of NMN or NR have used 250–500 mg/day orally. Some trials have studied up to 1,000 mg/day. These are research doses — not recommendations for personal use.

These results are estimates based on general formulas and are not a substitute for professional medical advice. Consult a healthcare provider before making health decisions.

How the Formula Works

Enter your body weight in your preferred unit.
The guide displays the fixed human clinical trial dose ranges for NMN (250–1,000 mg/day) and NR (300–1,000 mg/day) from published studies.
An animal-study extrapolation is shown separately (7–14 mg/kg/day from rodent studies). This is labeled clearly as animal-study context and is NOT a human dose guideline.
Animal extrapolated dose = weight (kg) × 7 to 14 mg/kg
The most commonly used dose in human trials (250–500 mg/day) is highlighted for reference.

Methodology & Sources

Reviewed and updated April 11, 2026 · Prepared by GetHealthyCalculators Editorial Team

Human trial dose ranges are drawn from published NMN and NR clinical trials including Yoshino et al. (2021, Science), Igarashi et al. (2022, NPJ Aging), Martens et al. (2020, Nature Communications), and Dellinger et al. (2017, Nature Communications). Animal dose ranges are from murine studies commonly cited in the literature (7–14 mg/kg/day). The 250 mg lower bound reflects the lowest dose tested in most human trials; 1,000 mg reflects the upper range studied in safety trials.

References

Nicotinamide mononucleotide increases muscle insulin sensitivity in prediabetic women · Science (Yoshino et al., 2021)
Oral nicotinamide riboside raises human muscle NAD+ and is well tolerated · Nature Communications (Martens et al., 2020)
Chronic nicotinamide riboside supplementation is well-tolerated and elevates NAD+ in healthy middle-aged and older adults · Nature Communications (Dellinger et al., 2017)
Effect of oral NMN on clinical parameters in healthy Japanese men · NPJ Aging (Igarashi et al., 2022)
Safety and metabolism of long-term administration of NIAGEN (nicotinamide riboside chloride) · Scientific Reports (2017)

Limitations

This tool shows research reference doses — not personalized dosing recommendations.
Human clinical trials on NMN and NR are still early-stage; most are short-term (4–12 weeks) with small sample sizes.
Long-term safety data (beyond 1 year) for high-dose NMN or NR in humans are not yet available.
Animal-to-human dose extrapolation is not clinically appropriate without medical guidance.
Individual response to NAD+ precursors varies based on genetics, gut microbiome, baseline NAD+ levels, and health status.
This tool does not account for form (NMN vs. NR vs. niacin), timing, or supplement quality differences.
Always consult a qualified healthcare provider before starting NMN, NR, or any supplement regimen.
Results are for informational and educational purposes only. Not a substitute for medical advice.

Frequently Asked Questions

What is NMN and how is it different from NR?

Both NMN (nicotinamide mononucleotide) and NR (nicotinamide riboside) are precursors to NAD+ (nicotinamide adenine dinucleotide), a coenzyme involved in cellular energy metabolism and DNA repair. NR is converted to NMN before being used to make NAD+. Both are sold as supplements and studied for potential roles in aging biology. The clinical evidence base for both is still developing.

What doses have been used in human clinical trials?

Published human trials have used a range of doses. NMN trials have primarily used 250 mg/day (Yoshino et al., 2021) up to 1,000 mg/day in safety studies. NR trials have used 300 mg/day up to 2,000 mg/day in some studies, though 500–1,000 mg/day is most common. Most trials lasted 4–12 weeks. No long-term (multi-year) human safety data exist as of 2026.

Is NMN or NR safe to take?

Short-term human trial data (up to 12 weeks) have not identified serious adverse events at doses up to 1,000–2,000 mg/day for NR and up to 900 mg/day for NMN. However, long-term safety in humans is not established. These supplements are not FDA-approved as drugs. Consult a qualified healthcare provider to evaluate whether they may be appropriate for you and at what dose.

What did the animal studies find about NMN/NR?

Rodent studies have shown NMN and NR supplementation can increase NAD+ levels in various tissues, improve metabolic markers, and in some studies extend healthy lifespan in mice. The typical doses used in mouse studies are 7–14 mg/kg/day (sometimes higher). These doses do not directly translate to human equivalents due to differences in metabolism, body composition, and biology.

Should I take NMN or NR for longevity?

This tool does not make supplement recommendations. The current human evidence for longevity benefits of NMN or NR is limited to surrogate endpoints (NAD+ levels, muscle insulin sensitivity, etc.) — no human trial has demonstrated life extension. The decision to supplement should be made in consultation with a healthcare provider who can review your health history, current medications, and individual risk factors.

Why is the animal-study dose shown separately?

Animal doses are shown for scientific transparency — researchers sometimes reference them in discussions of mechanism, but they are NOT appropriate as human dosing guidelines. Rodent metabolism differs substantially from human metabolism, and direct mg/kg extrapolation is not clinically validated for these compounds.

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NMN/NR Dose Guide

How the Formula Works

Methodology & Sources

References

Limitations

Frequently Asked Questions

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