Nicotinamide Riboside (NR): Uses, Benefits, Dosage & Safety
Last updated: June 2026 · Reviewed by the FactoWiki Editorial Team for clarity and source accuracy
Quick summary
Nicotinamide riboside (NR) is a form of vitamin B3 that raises NAD+, a coenzyme central to energy and cellular repair that declines with age. It reliably boosts NAD+, but proven anti-ageing benefits in humans are still pending.
What is Nicotinamide Riboside?
Nicotinamide riboside (NR) is a vitamin B3 derivative and a precursor to NAD+ (nicotinamide adenine dinucleotide), a coenzyme essential for energy production and cellular repair that naturally declines with age. NR (often branded Niagen) is sold, alongside NMN, as a leading 'NAD-boosting' longevity supplement.
What Nicotinamide Riboside is commonly used for
In supplements, Nicotinamide Riboside is most often included for skin & anti-aging support. It is used as nutritional support, not as a treatment for any medical condition — the distinction matters, because the claims on a sales page are often stronger than the evidence allows.
How Nicotinamide Riboside works
NR is converted in the body into NAD+, replenishing levels that fall with ageing. NAD+ fuels mitochondrial energy production and powers repair enzymes (like sirtuins and PARPs), which is the basis for NR's energy, metabolic and 'healthy ageing' marketing.
What the evidence says
Here's an honest snapshot of what published research suggests about Nicotinamide Riboside — including where the evidence is limited.
- NR reliably and safely raises blood NAD+ levels in human trials — this part is well established. (PubMed research)
- Whether that translates into meaningful anti-ageing, energy or metabolic benefits in people is not yet proven; results so far are mixed. (PubMed research)
Typical dosage used in studies
Human studies have commonly used roughly 250-500 mg/day, sometimes up to 1,000 mg. This is research information for context, not a recommendation — confirm what's appropriate for you with a healthcare professional.
Side effects and safety
Well tolerated in trials up to a year; mild side effects like nausea or fatigue are uncommon. Long-term effects are still being studied.
Medication interactions and who should avoid Nicotinamide Riboside
Medication & safety check
Low known interaction risk; as a newer compound, medical advice is sensible if you take medication or have a serious condition.
This is general information, not personal medical advice. If you take any medication, confirm it's safe to combine with Nicotinamide Riboside with your doctor or pharmacist first.
Sources & further reading
The summary above is drawn from peer-reviewed research and authoritative references. For general, authoritative background you can also consult:
- PubMed research on Nicotinamide Riboside
- NIH Office of Dietary Supplements
- NIH National Center for Complementary and Integrative Health
- MedlinePlus (U.S. National Library of Medicine)
Frequently asked questions
What does NR do?
It raises NAD+, a coenzyme essential for energy and cellular repair that declines with age.
Does NR slow ageing?
It reliably boosts NAD+, but proven anti-ageing benefits in humans aren't established yet.
NR or NMN?
Both are NAD+ precursors; NR has more human safety data, while NMN is also widely studied.
Is NR safe?
It's well tolerated in trials up to a year; long-term effects are still being studied.
Related ingredients to explore
Ingredients often studied or formulated alongside Nicotinamide Riboside — useful for understanding the full picture of a formula.