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)

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

score

evidence

Caution

risk

Proven Benefits

01Increases NAD+ levels

02May lower blood pressure

03May improve insulin sensitivity

04May improve arterial stiffness

05May support body composition

Chemical Forms

Recommended

Nicotinamide riboside chloride

Avoid

Nicotinamide (flush-free niacin — not the same compound)
Niacin (nicotinic acid — different pharmacokinetics and side-effect profile)

Expert Note

NR is typically stabilized as nicotinamide riboside chloride. Standard niacin and nicotinamide are different vitamin B3 forms that raise NAD+ through distinct pathways and lack the direct NR kinase pathway; they also carry higher flushing or hepatotoxicity risk at high doses.

Protocol

Amount

300-1000 mg

Frequency

Once daily

When

Morning with or without food; consistency matters more than timing.

Condition-Based Dosing

Healthy adults seeking general longevity support

300-500 mg daily— Start low and assess tolerance; benefits beyond NAD+ elevation are uncertain.

Overweight adults with metabolic concerns

1000 mg daily— Some trials use 1000 mg for metabolic outcomes; discuss with a clinician.

Safety & Limits

Upper Safe Limit

2000 mg/day (highest dose studied in short-term trials without serious adverse events; no official UL established)

Cycling

Safe for continuous use

Contraindications

Pregnancy or breastfeeding — insufficient safety data

Active cancer or history of cancer — theoretical concern due to NAD+ role in cellular proliferation

Avoid Combining With

✕Alcohol (may deplete NAD+ and B-vitamins, counteracting benefits)
✕High-dose nicotinic acid or nicotinamide (may compete for absorption pathways)

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