Educational dose math only — not medical advice, not a product recommendation, and not a pass/fail on whether a supplement will work for you.
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Trial reference

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1000 mg/day for 6 weeks in a randomized double-blind crossover trial in healthy middle-aged and older adults; well-tolerated, elevated whole-blood NAD+. Cited in our urolithin A vs NMN guide, which covers the NAD+ booster shelf context.

Educational only — not medical advice. Disclaimer.

NIH DSLD market slice

Median100 mg
Products171
Below99%

Bulk CSV dump 16 January 2026 · label entries through 2025. Disclosed amounts only — proprietary blends without gram weights excluded.

Trial floors

Primary

NAD+ elevation trial (1000 mg/day) · 1,000 mg over 6 weeks (limited evidence · how we grade this) · Secondary outcomes only — 1000 mg/day for 6 weeks in a randomized double-blind crossover trial in healthy middle-aged and older adults; well-tolerated, elevated whole-blood NAD+. Cited in our urolithin A vs NMN guide, which covers the NAD+ booster shelf context.

Label reading notes

  • Labels list NR in mg. Trials used 1000 mg/day of the chloride salt; shelf doses range from 250 to 500 mg per serving, below the studied floor.