NAD+
Also known as: NAD+, Nicotinamide adenine dinucleotide, NAD plus
Coenzyme / metabolic cofactor
Mechanism of Action
Essential coenzyme in cellular metabolism. Supplementation aims to restore declining NAD+ levels associated with aging.
Note: Precursors (NMN, NR) available as supplements
NAD+ (nicotinamide adenine dinucleotide) generates intense interest as a longevity compound, yet robust evidence remains thin — only 280 unique individuals contribute observational data, and just 1 clinical trial has been identified. Sentiment skews cautiously optimistic: 53 positive versus 11 negative self-reported assessments, though the majority (114) remain neutral — suggesting most individuals are still evaluating outcomes rather than reporting clear benefits.
Reported Outcomes
Clinical grade reflects published research; Community grade reflects user reports (n=35).
Metabolic and cellular health improvements
In a model of obesity-induced chronic kidney injury, renal NAD+ levels were found to be depleted; treatment with a GLP-1 receptor agonist restored renal metabolism homeostasis, including NAD+ levels.
Side Effects
Limited dataBased on 2 user reports (n=2). Frequency indicates how often each was mentioned.
Uncommon (1-5%)
Dosing
Standard Protocol
- Starting Dose
- 100-500mg IV or 250-1000mg oral precursors
- Titration
- Varies by form (IV, sublingual, oral precursors)
- Half-life
- Variable by form
- Administration
- IV infusion, subcutaneous, or oral precursors (NMN, NR)
Community Dosing Patterns
Based on 98 mentions
Community-reported patterns, not medical advice.
Pricing
Research-grade reference pricing for 500mg vial. Prices vary by vendor and quantity. Research chemicals require self-mixing and lack medical oversight. Shipping is not included.
We do not list vendors. Prices are aggregated from community reports and should be treated as rough ranges.
US Research Grade
Single small vial from US domestic vendors
US Research (Bulk)
Per-dose equivalent when buying larger US vials
China Research
Per-vial when buying 10-pack from Chinese vendors
Research
Key Studies
J Am Coll Cardiol (2021)
Mol Psychiatry (2021)
J Nanobiotechnology (2024)
Nat Commun (2025)