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Nicotinamide Riboside (NR) Side Effects & Safety

This content is for informational purposes only and does not constitute medical advice. Consult your healthcare provider before starting any supplement. Full disclaimer

Safety Profile

Overall safety rating: Generally Safe

Potential Side Effects

  • Generally well-tolerated up to 2000mg/day in clinical trials
  • Mild nausea, fatigue, and headache reported infrequently
  • Flushing is rare (unlike niacin, NR does not typically cause flushing)
  • Mild GI discomfort at higher doses

Drug & Supplement Interactions

  • No significant drug interactions identified in clinical trials
  • Theoretical concern with chemotherapy — NAD+ supports DNA repair in all cells; consult oncologist
  • May have additive effects with other NAD+ precursors (NMN, niacin)

Maximum Dose

Do not exceed: 2000mg/day (doses up to 2000mg have been tested safely in short-term trials)

Full Nicotinamide Riboside (NR) Guide

References

  1. (). Chronic nicotinamide riboside supplementation is well-tolerated and elevates NAD+ in healthy middle-aged and older adults. Nature Communications. DOI
  2. (). Nicotinamide riboside augments the aged human skeletal muscle NAD+ metabolome and induces transcriptomic and anti-inflammatory signatures. Cell Reports. DOI
  3. (). Nicotinamide riboside is uniquely and orally bioavailable in mice and humans. Nature Communications. DOI