NAD+
Also known as: Nicotinamide Adenine Dinucleotide, NAD, β-NAD, NAD+ precursor
Effective Dosage
No established dose from provided studies
What the Science Says
NAD+ (nicotinamide adenine dinucleotide) is a molecule found in every cell of your body that helps convert food into energy and supports DNA repair. Research in the provided studies suggests it plays a role in muscle stem cell function, metabolic processes in the liver, and cellular stress responses. One small randomized controlled trial found that NAD+ added to standard treatment improved hearing recovery in sudden sensorineural hearing loss patients more than standard treatment alone, though the study was small (38 participants).
What It Doesn't Do
Not proven to reverse aging in humans — that's mostly animal and lab data. Won't reliably boost NAD+ blood levels through oral supplementation at typical doses — one clinical trial found NR (a common NAD+ precursor) did not raise plasma NAD+ levels enough to affect nerve regeneration. No solid human evidence it improves cognition, builds muscle, or extends lifespan. Most exciting claims come from pre-clinical studies, not human trials.
Evidence-Based Benefits
NAD+ (nicotinamide adenine dinucleotide) is a molecule found in every cell of your body that helps convert food into energy and supports DNA repair. Research in the provided studies suggests it plays a role in muscle stem cell function, metabolic processes in the liver, and cellular stress responses. One small randomized controlled trial found that NAD+ added to standard treatment improved hearing recovery in sudden sensorineural hearing loss patients more than standard treatment alone, though the study was small (38 participants).
Weak EvidenceEffective at: No established dose from provided studies
Source: auto-research
Absorption & Bioavailability
Poor to Unknown — one provided clinical trial (NR supplementation) found oral dosing did not meaningfully raise plasma NAD+ levels. Direct oral NAD+ faces significant absorption challenges; precursor forms vary in effectiveness.
Red Flags to Watch For
- Most marketing claims are based on animal or lab studies, not human clinical trials
- One clinical trial found NR (a popular NAD+ precursor) failed to raise plasma NAD+ levels or improve nerve outcomes at tested doses
- The single positive human RCT (hearing loss) was very small — only 38 participants — and needs replication
- Many products on the market (165 registered in NIH DSLD) use NAD+ precursors like NR or NMN, not NAD+ itself, and these are not interchangeable
- No established safe or effective dose has been confirmed in the provided human studies
Products Containing NAD+
See how NAD+ is used in these analyzed products:
Research Sources
- PubMed
- NIH DSLD
This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-04-09