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.

Want the outcome before the arithmetic? The reason check opens any registry entry on this page with its trial result first, then compares your daily intake with the studied amount.

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.