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NAD+: What the Research Shows About Nicotinamide Adenine Dinucleotide

A research overview of NAD+ (CAS 53-84-9): the redox coenzyme, what published research examined in energy metabolism and sirtuin enzymology, and lab handling. For research use only.

All research guides

NAD+ is a redox coenzyme present in every living cell, studied across energy-metabolism, sirtuin-enzymology, and mitochondrial research. This guide summarizes what the published scientific literature has examined about NAD+, its molecular profile, and how it is handled in a research setting. It is written for researchers and is not medical guidance.

What is NAD+?

NAD+ (β-nicotinamide adenine dinucleotide, CAS 53-84-9, molecular formula C21H27N7O14P2, molar mass ≈ 663.4 g/mol) is a naturally occurring dinucleotide coenzyme. It is supplied as a lyophilized powder in a light-protective amber vial for laboratory research.

Research-use note: NAD+ is a research chemical supplied strictly for laboratory research. It is not an approved drug, cosmetic, or supplement and is not for human or animal consumption. Findings below come from biochemical, cell-culture, and animal-model studies.

Evidence at a glance

Human data mostly on precursors

The strong human evidence covers NAD+ precursors taken orally. Direct NAD+ administration does not have a comparable trial base.

Why researchers are interested

NAD+ is a required cofactor for the sirtuins and for PARP driven DNA repair, and cellular levels fall with age. Whether restoring them restores function is the central question of a large and active field, which is why the precursor work has moved into human trials.

What the research found

  • Precursors raise NAD+ in humansOral NR and NMN measurably increase blood NAD+ levels (Yoshino, 2018)
  • Better mitochondrial functionRestored mitochondrial function and metabolic markers in animal models (Cantó, 2015)
  • Central role in ageing biologyNAD+ decline linked to metabolic and neurodegenerative changes (Verdin, Science 2015)

Reported in the literature

  • Oral precursor trials of NR and NMN generally report good tolerability at the doses studied.
  • Those tolerability findings belong to the oral precursors and do not transfer to injected or infused NAD+.
  • Controlled trial data for direct NAD+ administration is limited.

Findings are summarised from the sources listed under References on this page, and from approved product labelling where a compound has one. These are outcomes observed in published studies, not effects claimed for any person, and nothing here is a recommendation for human use.

How NAD+ works (the mechanism studied)

NAD+ has two distinct roles in the research literature. As a redox cofactor it cycles between its oxidized (NAD+) and reduced (NADH) forms, carrying electrons through glycolysis, the TCA cycle, and oxidative phosphorylation. Separately, it is consumed as a substrate by three enzyme families: sirtuins, PARPs, and CD38, which is why the cellular NAD+ pool and the NAD+/NADH ratio are commonly measured endpoints in metabolic and mitochondrial studies.

What researchers have studied

The NAD+ literature is large and largely review-driven. The most frequently cited overviews include:

  • Energy-metabolism research: Cantó et al. (Cell Metab, 2015) reviewed NAD+ metabolism as a balancing act between mitochondrial and nuclear control of energy homeostasis.
  • Aging-biology research: Verdin (Science, 2015) reviewed the role of NAD+ in aging, metabolism, and neurodegeneration.
  • Precursor research: Yoshino et al. (Cell Metab, 2018) reviewed the biology of the NAD+ intermediates NMN and NR.

These findings describe research outcomes in laboratory models, not validated outcomes in humans.

Handling and reconstitution in the laboratory

NAD+ is typically supplied as a lyophilized powder in an amber vial, since the compound is light-sensitive. Standard laboratory practice is to reconstitute it with bacteriostatic water, swirl (not shake) until dissolved, and store the reconstituted solution refrigerated (2–8 °C). The lyophilized powder is generally stored frozen and protected from light. (General lab-handling notes, not usage instructions.)

For research use only

All products and information referenced here are intended strictly for laboratory and scientific research use only. They are not for human or animal consumption and are not drugs, foods, supplements, cosmetics, or medical devices. No statement here should be interpreted as medical advice.

Explore NAD+ and related research compounds

References

  1. Cantó C, Menzies KJ, Auwerx J. NAD+ metabolism and the control of energy homeostasis: a balancing act between mitochondria and the nucleus. Cell Metab. 2015. PubMed
  2. Verdin E. NAD+ in aging, metabolism, and neurodegeneration. Science. 2015. PubMed
  3. Yoshino J, Baur JA, Imai SI. NAD+ intermediates: the biology and therapeutic potential of NMN and NR. Cell Metab. 2018. PubMed