Name: NAD+ 100mg
Brand: RetaLABS.is
SKU: nad-100mg

Question 1

What is NAD+ used for in research?

Accepted Answer

NAD+ (nicotinamide adenine dinucleotide) is a central cofactor in cellular energy metabolism, serving as a hydride carrier in the citric acid cycle and oxidative phosphorylation, and a substrate for several classes of regulatory enzymes. In research, it is used as a reference compound in enzymatic activity assays, particularly for measuring the activity of NAD+-dependent dehydrogenases and oxidoreductases, where the NAD+/NADH transition can be tracked spectrophotometrically at 340 nm. Sirtuin biology research utilises NAD+ extensively, as SIRT1-7 deacetylases require NAD+ as a co-substrate and are key regulators of metabolic gene expression, mitochondrial biogenesis, and the DNA damage response. PARP (poly ADP-ribose polymerase) research uses NAD+ as the substrate for ADP-ribosylation reactions central to DNA repair. NAD+ is also used in circadian rhythm research, as SIRT1 and CLOCK/BMAL1 form a feedback loop regulated by NAD+ levels. Direct NAD+ application is essential for in vitro enzymatic kinetics where precursor conversion pathways cannot be assumed.

Question 2

How does NAD+ relate to sirtuin research?

Accepted Answer

Sirtuins (SIRT1-7) are a family of NAD+-dependent protein deacetylases and ADP-ribosyltransferases that function as metabolic and stress-response sensors. They require NAD+ as an obligate co-substrate: for every deacetylation reaction, one molecule of NAD+ is consumed, producing nicotinamide and O-acetyl-ADP-ribose as byproducts. This mechanistic dependency means sirtuin activity is directly linked to cellular NAD+ availability, NAD+ depletion suppresses sirtuin function, and NAD+ supplementation can restore or amplify it. SIRT1, the most studied family member, deacetylates key transcription factors including PGC-1α (mitochondrial biogenesis), FOXO proteins (oxidative stress resistance), and p53 (apoptosis control). In ageing research, the observed decline in cellular NAD+ with age is linked to reduced SIRT1 activity, which is proposed as a contributing mechanism to age-associated metabolic and mitochondrial dysfunction. Supplying NAD+ directly to research systems enables controlled modulation of sirtuin activity independent of precursor conversion kinetics.

Question 3

How should research-grade NAD+ be stored?

Accepted Answer

Store lyophilised NAD+ at −20°C in a desiccated environment, protected from light. NAD+ is hygroscopic, it absorbs atmospheric moisture readily, and this absorption accelerates hydrolytic degradation of the glycosidic bond between the nicotinamide and ribose moieties, reducing effective NAD+ concentration. Lyophilised storage with silica gel desiccant is recommended; desiccant packaging should be inspected and refreshed periodically for long-term storage. Protect vials from light, as NAD+ is also photosensitive. Once reconstituted in sterile water or PBS, NAD+ solutions are relatively labile at room temperature and should be used promptly. If immediate use is not possible, aliquot the reconstituted solution into single-use volumes and store at −20°C, a single freeze-thaw cycle per aliquot is acceptable for this small molecule. Reconstituted solutions should not be stored at 2–8°C for extended periods, use or freeze within 24 hours of reconstitution.

Question 4

What is the difference between NAD+, NMN, and NR in research?

Accepted Answer

NAD+ (nicotinamide adenine dinucleotide) is the active coenzyme that directly participates in cellular redox chemistry and serves as the substrate for sirtuin and PARP reactions. NMN (nicotinamide mononucleotide) and NR (nicotinamide riboside) are biosynthetic precursors that are converted intracellularly to NAD+ through distinct enzymatic steps of the NAD+ salvage pathway. Using NAD+ directly in research bypasses precursor conversion and is essential for applications where a defined, known concentration of the active coenzyme is required (for example, enzymatic kinetics assays, cell-free biochemical studies, and applications where precursor transport proteins (SLC12A8 for NMN, concentrative transporters for NR) cannot be assumed to be expressed. In contrast, NMN and NR studies focus on the dynamics of precursor uptake and conversion) relevant to in vivo pharmacokinetics but introducing a variable conversion efficiency that can complicate mechanistic interpretation. For assay standardisation and in vitro biochemistry, direct NAD+ application is the appropriate choice.

NAD+ 100mg

Customer Reviews

Frequently Asked Questions

Research Guides