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Compound

Nicotinamide Riboside (NR)

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Nicotinamide Riboside (NR). NAD+ precursor with bioavailability and longevity research interest.

How it works. Salvage pathway precursor that raises NAD+ levels in blood and tissues.

What the research supports. 2 graded claims. Strongest: Raises NAD+ in humans (strong).

How much to take. Typical dose: 250–500 mg/d (some trials up to 1 g).

Side effects and interactions. 1 medication interaction listed. No serious side effects listed at normal doses.

Stacking. Pairs well with NAD+ precursor (NMN or NR), Omega-3.

Common forms. Available as NR chloride (Niagen).

Key studies. 9 studies cited. The strongest are listed with links to PubMed.

Community. Experiences from people who have tried Nicotinamide Riboside (NR). Anecdotes are not medical advice.

Nicotinamide Riboside (NR). NAD+ precursor with bioavailability and longevity research interest.

Molecular structureC11H15N2O5+ · 255.25 g/mol

What it is

NAD+ precursor with bioavailability and longevity research interest.

Also called

Niagen

Food sources

Trace in milk

Goals

Healthy AgingEnergy Production

How it works

Salvage pathway precursor that raises NAD+ levels in blood and tissues.

Pathways

  • NAD+ salvage pathway

Effects

  • ↑NAD+ levels increases

What the research supports

Raises NAD+ in humansstrong
Functional/clinical benefits still being establishedlimited

Strong: consistent results across large trials or meta-analyses. Moderate: several trials, mostly positive. Limited: small or mixed studies. Preclinical: animal or cell research only.

Typical dose
250–500 mg/d (some trials up to 1 g)
TimingConsistent daily timing recommended; split larger doses if GI tolerance is a concern.
With foodWith a meal containing fat for fat-soluble compounds; otherwise either.
Best formMost evidence is based on the nr chloride (niagen) form.
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Side effects & interactions

Common side effects

  • Flushing (rare)
  • Headache

Medication interactions

Prescription medications (general)minor

Always disclose Nicotinamide Riboside (NR) use to your prescriber — additive, antagonistic, or pharmacokinetic interactions are possible.

Check any supplement–medication combination with your pharmacist before starting.

Combines with

Pairs well

  • NAD+ precursor (NMN or NR)Complementary mitochondrial and sirtuin support.
  • Omega-3Lowers inflammation and supports membrane integrity.

Common forms

  • NR chloride (Niagen)

Key studies

9 studies cited in total.

PubMed: Nicotinamide Riboside (NR) — Raises NAD+ in humans ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Nicotinamide Riboside (NR) and "Raises NAD+ in humans". Filter by RCT, meta-analysis, or year on the results page.

PubMed: Nicotinamide Riboside (NR) — Functional/clinical benefits still being established ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Nicotinamide Riboside (NR) and "Functional/clinical benefits still being established". Filter by RCT, meta-analysis, or year on the results page.

PubMed: Nicotinamide Riboside (NR) — randomized controlled trial ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Nicotinamide Riboside (NR) and "randomized controlled trial". Filter by RCT, meta-analysis, or year on the results page.

Discussion

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