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Longevity/Heart/Weight

Nicotinamide Riboside (NR)

Precursor to NAD+ that may support cellular energy and metabolic health in middle-aged and older adults.

Nicotinamide Riboside (NR)
40
score
B
evidence
Caution
risk

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Use with caution

This supplement may interact with medications, medical conditions or sensitive populations. Review safety before use.

Quick Take

Emerging evidence for raising NAD+ levels, but clinical benefits remain unproven in healthy adults.

Nicotinamide riboside is a vitamin B3 derivative that serves as a precursor to nicotinamide adenine dinucleotide (NAD+), a coenzyme essential for mitochondrial energy production, DNA repair, and cellular signaling. Human trials consistently show that oral NR raises blood NAD+ concentrations, but evidence that this translates into meaningful clinical improvements is still emerging. Small studies suggest potential benefits for blood pressure, insulin sensitivity, and inflammatory markers, particularly in overweight or middle-aged adults.

Potential benefits

01
Increases NAD+ levels
02
May lower blood pressure
03
May improve insulin sensitivity
04
May improve arterial stiffness
05
May support body composition

Protocol

Amount
300-1000 mg
Frequency
Once daily
When
Morning with or without food; consistency matters more than timing.

Onset Time

NAD+ rises within hours to days; clinical effects, if any, may take 6-12 weeks.

Who Should Consider

Adults 40+ concerned with aging
Overweight adults with insulin resistance
People with declining energy levels
Those interested in longevity research

Food Sources

  • Cow's milk (trace amounts)
  • Brewer's yeast (trace amounts)

How It Works

NR is phosphorylated to form NAD+, replenishing levels that decline with age. Elevated NAD+ fuels oxidative phosphorylation, activates sirtuins involved in DNA repair and mitochondrial biogenesis, and influences PARP enzymes that maintain genomic stability. The direct link between increased NAD+ and improved tissue function in humans is still under investigation.

Updated 5/19/2026

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