Nicotinamide Riboside
Also known as: NR
Nicotinamide riboside is a form of vitamin B3 explored in healthy-aging and energy-metabolism contexts. Studies show it can raise blood markers of NAD+, a molecule involved in cellular energy processes. However, whether that translates into meaningful long-term health outcomes in people is not established, and the evidence is best described as preliminary and honestly uncertain.
Snapshot
Evidence level is outcome-specific; a supplement can have stronger evidence for one use and limited evidence for another.
What this page can tell you: Commonly discussed timing, food notes, caution categories, and an honest note on how much source review this entry still needs.
What it cannot: Whether this is appropriate for you personally, or that it treats, prevents, or cures any condition. Informational only — discuss with a clinician or pharmacist.
🕒 Timing
When: Midday, Morning
Food: With or without food
Commonly taken earlier in the day; timing is otherwise flexible.
💊 Common use range
250–500 mg
Doses in studies vary; no long-term upper limit is well established — verify and follow product guidance.
Ranges are informational, not a recommended dose. Talk to a professional about what is right for you.
⚠️ Commonly noted interactions (supplements)
None listed.
Often about absorption or timing rather than danger — separating doses is common. This list is not exhaustive.
🧭 Baseline caution
General caution for ordinary, common use — before accounting for your specific dose, medications, health history, or procedures.
No general caution factors flagged for ordinary use. See context alerts below for situations that may still apply to you.
Caution level is an informational summary of commonly discussed caution categories and doses — not a safety rating, approval, or medical advice. Low caution does not mean safe for you.
🩺 Medication caution categories
None flagged here, but always review your full routine with a professional.
🏥 Surgery & procedure caution
Not a well-established surgical concern; share your full supplement list with your care team.
If you have a procedure scheduled, bring your full supplement list to your surgical and anesthesia team. Do not stop prescribed medication unless your clinician tells you to. Do not start or stop supplements based only on this app.
✅ Quality checklist
- Prefer products with third-party testing or a certificate of analysis (COA).
- Check the label for the exact form and the elemental or active amount per serving.
🧩 Commonly paired with
🔁 Alternatives
🗣️ Questions for a professional
- Given the preliminary evidence, is nicotinamide riboside worth trying for my goals?
🔬 Evidence snapshot
Nicotinamide riboside is an oral NAD+ precursor (a form of vitamin B3). Human trials reliably raise blood NAD+ dose-dependently and it is generally well tolerated over weeks to months — but clinical health or anti-aging benefits are NOT established: trials are short and functional endpoints (blood pressure, exercise, metabolic measures) show little improvement. Long-term safety is unknown; a higher NAD+ biomarker is not itself a proven benefit.
🧪 Forms & quality
Needs evidence review — no source-reviewed information yet. We only show dose and monitoring details after they have been checked against reputable sources.
See the supplement glossary for what form names like "L-", chelated, or standardized extract mean.
📏 Dose & monitoring
Needs evidence review — no source-reviewed information yet. We only show dose and monitoring details after they have been checked against reputable sources.
Evidence vs. burden: Not yet reviewed
😐 Commonly reported side effects
- Generally reported as well tolerated in short studies; digestive upset in some people
Non-exhaustive and individual.
🔄 Cycling & breaks
No established cycling pattern.
📅 Daily use notes
Raising an internal marker is not the same as a proven health benefit; keep expectations grounded in the current, limited evidence.
📋 Source review status
Source-reviewed — last reviewed 2026-07-12
Reconciled 2026-07-12: two human RCTs (PMC5876407, PMC6611812). NR dose-dependently raises NAD+ and is well tolerated short-term, but functional/anti-aging benefits are not established and long-term safety is unknown. Framed so the NAD+ biomarker rise is never presented as a health benefit.
Research backlog (queries to verify):
- nicotinamide riboside NAD+ human randomized trial outcomes
- nicotinamide riboside safety long-term evidence
📚 References
- RCT — chronic NR raises NAD+ (healthy older adults)PubMed review — Randomized crossover: NR well tolerated, no serious AEs; raised PBMC NAD+ ~60% vs placebo; exploratory BP/aortic-stiffness endpoints not significant.
- RCT — long-term NIAGEN (NR) safety & NAD+PubMed review — 8-week RCT: dose-dependent whole-blood NAD+ rise (22/51/142% at 100/300/1000 mg); no serious AEs; adverse events similar to placebo.
Verified against the source shown. See the research-status page for how review works.
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