Literature context: three NAD+-using enzyme groups are named here - sirtuins, PARPs, and CD38. This count is not a product result.
NAD+ enzyme-family literature contextPlain-English research guideNAD+
NAD+ research guide
Everything worth knowing, without the jargon.
NAD+ is a coenzyme - a small helper molecule every living cell needs to run its chemistry. It is not a peptide and not an approved medicine. This guide walks through what the research actually says about it, and what it does not.
Form Labs materials are research reference materials, not the approved medicines; no Form Labs product is approved for human or veterinary use.
REV 2026-10 ยท 1 Oct 20263 peer-reviewed studiesResearch-use-only context
What the papers reportThird-party literature - not product claims
Identity context: NAD+ and NADH are the paired redox forms named in the guide. This is chemistry context, not a product result.
NAD+ and NADH redox-pair identityWhy it matters
Why is NAD+ studied?
NAD+ is studied because it is a coenzyme, a small helper molecule every living cell needs to run its chemistry. This guide describes NAD+ as not a peptide. Researchers study NAD+ for its role in electron-transfer chemistry as part of the NAD+/NADH pair, and for the sirtuin, PARP and CD38 enzyme families that use NAD+ up.
NAD+ literature and laboratory findings.
Research use only means this material is sold for in-vitro laboratory work - controlled experiments outside a living body. It is not tested, packaged or approved as a medicine, supplement or food, and it must not be used in or on people or animals.
Belenky et al. (Trends in Biochemical Sciences, 2007) reviewed NAD+ synthesis, recycling and consumption in published cell-biology experiments. Imai et al. (Nature, 2000) reported NAD+-dependent Sir2 activity in purified yeast protein and cell extracts, with no animals or people.
The source guide keeps study context separate from Form Labs product claims.
Study observations
What laboratory observations have NAD+ studies reported?
Imai et al. (Nature, 2000) reported that purified yeast Sir2 required NAD+ for histone deacetylation and consumed NAD+ during the reaction. The NAD+ experiment involved purified protein and yeast cell extracts, with no animals or people. Covarrubias et al. (Nature Reviews Molecular Cell Biology, 2021) reviewed the broader literature; precursor findings remain separate from NAD+ findings.
NAD+ laboratory findings Findings stay tied to the cited study and its model.
Redox literature
Belenky et al. (Trends in Biochemical Sciences, 2007) reviewed NAD+ synthesis, recycling and consumption in published cell-biology experiments.
Sir2 laboratory experiment
Imai et al. (Nature, 2000) reported NAD+-dependent Sir2 activity in purified yeast protein and cell extracts, with no animals or people.
Precursor distinction
Covarrubias et al. (Nature Reviews Molecular Cell Biology, 2021) reviewed predominantly animal intervention evidence and distinguished NMN and NR from NAD+ itself.
Pharmacology at a glance
- Research code
- NAD+
- Class
- NAD+ identity, redox-pair chemistry, and NAD+-using enzyme literature. Class wording here means the research category named by the source guide.
- Molecule
- NAD+ / nicotinamide adenine dinucleotide; identity wording comes from the source guide and matching product record.
- Reported half-life
- Not listed in the source guide for this consumer entry; half-life means the time for a measured amount to fall by half.
- Originator
- Not listed in the source guide; Form Labs did not run the cited studies.
- Approval status
- Laboratory research material only.
What it has been studied for
What has NAD+ been studied for?
NAD+ research covers three study areas: NAD+ redox chemistry and enzyme-substrate biology, the sirtuin co-substrate record in which Sir2 and sirtuin enzymes use NAD+ as a co-substrate, and NAD+ pathway reviews across metabolism, DNA repair, chromatin, senescence and immune-cell literature. All three are literature topics, not product results.
Study areas from the published literature.
NAD+ redox and enzyme-substrate biology
Study topic: how NAD+ sits in redox chemistry and in enzyme systems that consume it.
Belenky et al., Trends Biochem Sci, 2007Sirtuin co-substrate record
Study topic: Sir2 and sirtuin enzymes using NAD+ as a co-substrate during deacetylase reactions.
Imai et al., Nature, 2000NAD+ pathway overview
Study topic: cellular pathways where NAD+ is discussed across metabolism, DNA repair, chromatin, senescence, and immune-cell literature.
Covarrubias et al., Nat Rev Mol Cell Biol, 2021The studies
What did the NAD+ studies find?
The three NAD+ studies cited in this guide are two reviews and one laboratory experiment. Belenky et al. (Trends in Biochemical Sciences, 2007) surveyed how cells make, recycle and spend NAD+. Imai et al. (Nature, 2000) showed the sirtuin enzyme Sir2 only worked when NAD+ was present, in purified yeast protein with no animals or people. Covarrubias et al. (Nature Reviews Molecular Cell Biology, 2021) reviewed the wider NAD+ pathway literature.
Open any study for a plain summary, what it measured, the finding, and a link to the paper.
A survey of how cells make NAD+, how they recycle it, and which enzymes use it up.
- Studied in
- Published cell-biology literature spanning yeast, bacterial and mammalian cell studies.
- Design
- The authors read the existing experimental literature on NAD+ and organised it into the routes cells use to build the molecule and the routes that consume it.
- Measured
- Nothing new was measured here. The value of the paper is the map it draws: which reactions produce NAD+, and which spend it.
Cells do not make NAD+ once and keep it (Belenky et al., Trends Biochem Sci, 2007). They run a constant recycling loop, because enzymes such as sirtuins, PARPs and CD38 break NAD+ apart when they act (Belenky et al., Trends Biochem Sci, 2007). That is why the same molecule turns up in papers on energy metabolism and in papers on DNA repair - it is being spent in both places (Belenky et al., Trends Biochem Sci, 2007).
DOI 10.1016/j.tibs.2006.11.006The experiment that showed the sirtuin enzyme Sir2 cannot do its job without NAD+.
- Studied in
- Purified yeast Sir2 protein and yeast cell extracts, in vitro.
- Design
- The researchers gave the Sir2 enzyme its target and watched whether it acted - once with NAD+ present, once with NAD+ absent.
- Measured
- Whether Sir2 stripped acetyl groups from histones, the spool proteins DNA winds around, and whether NAD+ was consumed while it did so.
Sir2 only worked when NAD+ was present, and it used the NAD+ up as it went (Imai et al., Nature, 2000). That tied a gene-regulating enzyme directly to the cell's energy chemistry: how much NAD+ is around becomes a signal the enzyme can read (Imai et al., Nature, 2000). Most later research linking NAD+ to ageing traces back to this connection (Imai et al., Nature, 2000).
DOI 10.1038/35001622A survey of where NAD+ research had reached, and of how much of the evidence comes from animals rather than people.
- Studied in
- Published literature spanning cell culture, mouse studies, and a smaller number of human trials.
- Design
- The authors reviewed the accumulated research on NAD+ across metabolism, DNA repair, cell ageing and immune signalling.
- Measured
- No new measurement. The review's contribution is stating plainly which claims rest on mouse data and which have human evidence behind them.
NAD+ levels were reported to fall with age in several tissues, while the enzymes that consume NAD+ grow busier at the same time (Covarrubias et al., Nat Rev Mol Cell Biol, 2021). The review is careful about what that does and does not establish: most of the intervention evidence comes from animals, and from the precursors NMN and NR rather than NAD+ itself, so the human picture remained open (Covarrubias et al., Nat Rev Mol Cell Biol, 2021).
DOI 10.1038/s41580-020-00313-xEvidence and limitations
What does the NAD+ research mean, and what does it not?
The NAD+ guide is a literature map, not a product claim. Most intervention evidence comes from animals and from the precursors NMN and NR rather than NAD+ itself (Covarrubias et al., Nature Reviews Molecular Cell Biology, 2021), so findings about those precursors should not be read as findings about NAD+. Where the source guide does not list participant counts or study details, this page does not invent them.
The source guide is a literature map, not a product claim
The cited papers are used for identity, pathway, marker, model, or analytical context. They do not become Form Labs results or promises.
Study details are limited to the source record
Where the source guide does not list participant counts, model details, study amounts, or study-stage labels, this page does not invent them.
Label and available report
Storage and batch decisions should follow the product label and any verified matching COA. Source storage note: 2-8 C, dry and protected from light.
Lab handling
How is NAD+ handled as reference material?
NAD+ is laboratory reference material, not for human consumption or veterinary use. Storage and lot checks follow the product label and any verified matching certificate of analysis (COA). This guide's catalogue record notes storage at 2-8 C and protection from light. Historical sample reports do not verify current lot identity, purity or release status.
Research-use boundary
Follow the product label and laboratory procedures for storage. Historical sample reports do not establish current lot identity, purity or release status.
Educational boundary
This guide summarises third-party literature; Form Labs did not run the cited studies.
Research-use boundary
For laboratory research use only. 21+ only. Not for human consumption or veterinary use.
Glossary
Plain-English definitions.
- NAD+
- Nicotinamide adenine dinucleotide; a coenzyme named in redox and enzyme-substrate papers.
- NADH
- The paired reduced form that cycles with NAD+ in redox chemistry.
- Electron transfer
- Movement of electrons from one molecule to another during a chemical reaction.
- Coenzyme
- A small molecule that helps enzymes carry out chemical reactions.
- Sirtuin
- An NAD+-dependent enzyme-family name in papers on protein deacetylation and cell signalling.
- PARP
- Poly(ADP-ribose) polymerase; an enzyme-family name in DNA-repair literature.
- CD38
- A cell-surface enzyme named in immune-cell signalling and NAD+-consuming enzyme literature.
- COA
- Certificate of analysis; the batch paperwork that controls identity, purity, appearance, and release checks.
- Research use only
- A lab-only boundary. It means not for human consumption, veterinary use, medical use, or cosmetic use.
- Literature context
- A plain summary of what cited papers discuss, not a product result.
FAQ
What are the most common questions about NAD+?
NAD+ is described in this guide as a coenzyme, not a peptide. The most common questions about NAD+ cover the difference between NAD+ and NADH, how NAD+ differs from NMN and NR, which enzymes use up NAD+, whether NAD+ declines with age, what the Sir2 experiment showed and its Australian status. Form Labs supplies NAD+ as laboratory reference material only.
NAD+ is a coenzyme - a small helper molecule every living cell needs to run its chemistry. It is not a peptide, and it is not an approved medicine. Form Labs supplies it strictly as laboratory reference material.
NAD+ and NADH are the same molecule in two states: NAD+ before it takes electrons on, NADH after. The cell cycles it back and forth all day, which is why papers write the pair as NAD+/NADH rather than treating them as two separate things.
No. NMN and NR are precursors - molecules the body converts into NAD+. This distinction matters when reading the literature: most human work in this field used those precursors rather than NAD+ itself, so a finding about NMN or NR should not be read as a finding about NAD+.
Three enzyme families consume NAD+ outright rather than borrowing it: sirtuins, PARPs and CD38. PARPs are called in when DNA is damaged; sirtuins are studied around how genes get switched on and off. Because these families consume it, researchers describe NAD+ as something the cell has to keep replacing.
Reviews report NAD+ levels falling with age in several tissues while the enzymes that consume it grow busier at the same time. The review authors are careful about what that establishes: most of the intervention evidence comes from animals, and from the precursors NMN and NR rather than NAD+ itself. The human picture remains open.
Sir2 only worked when NAD+ was present, and used the NAD+ up as it went - tying a gene-regulating enzyme directly to the cell's energy chemistry. That was a laboratory experiment on purified yeast protein: no animals and no people.
No. NAD+ is not an approved medicine and is not on the Australian Register of Therapeutic Goods. Form Labs supplies it as laboratory reference material only, not for human or veterinary use.
References
Every figure, sourced.
Educational references to third-party literature. Form Labs is unaffiliated with the study authors.
Plain note: NAD+ redox and enzyme-substrate overview. Citation: Belenky et al., Trends Biochem Sci, 2007.. DOI means a permanent article link code; DOI: 10.1016/j.tibs.2006.11.006.
DOIPlain note: Sir2/sirtuin NAD+ co-substrate paper. Citation: Imai et al., Nature, 2000.. DOI means a permanent article link code; DOI: 10.1038/35001622.
DOIPlain note: Cellular NAD+ pathway review. Citation: Covarrubias et al., Nat Rev Mol Cell Biol, 2021.. DOI means a permanent article link code; DOI: 10.1038/s41580-020-00313-x.
DOICitations are provided for education only. No therapeutic, weight-loss, or efficacy claims are made.
How we produce these guides
These guides are written and maintained in-house by the Form Laboratories research team. They summarise published literature and link to the cited papers. Form Laboratories did not run those studies. They are not authored by a named clinician and are not medical advice.
Findings remain tied to the study population, model and limits. Cell and animal observations remain separate from clinical results. Everything we supply is research-use-only reference material, not for people or animals.
The product
Form Laboratories - NAD+
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