OXIDATIVE PATHWAY RESEARCH

NAD+ Precursor Research: Cellular Energy and Sirtuin Pathways

Velox Peptides Research Team·Published May 2026·6 min read
CAS Number
53-84-9
Class
Pyridine dinucleotide coenzyme
Key Pathway
Sirtuins / cellular redox
HPLC Purity
≥99.5% (batch-verified)
For in vitro research use only. NAD+ is supplied solely as a research reagent for in vitro use and is not for human or veterinary consumption.

What is NAD+?

NAD+ (nicotinamide adenine dinucleotide) is one of the most fundamental coenzymes in cellular biology, present in every living cell. It exists in two interconverting forms — oxidised (NAD+) and reduced (NADH) — and shuttles electrons between metabolic reactions, making it central to how cells extract energy from nutrients.

Beyond its classical role in energy metabolism, NAD+ is a required substrate for two important enzyme families: the sirtuins and the PARPs. This dual role — as both an energy carrier and a signalling substrate — is what drives much of the current research interest in NAD+ and its precursors.

Sirtuins, cellular energy and the precursor rationale

Sirtuin signalling. Sirtuins are NAD+-dependent enzymes studied extensively for their association with cellular stress responses, DNA repair, and metabolic regulation in animal models. Because sirtuin activity depends on available NAD+, cellular NAD+ levels are studied as a regulator of these pathways.

The precursor rationale. Cellular NAD+ levels are reported to decline with age in preclinical models. Much research therefore focuses on precursors — molecules the cell converts into NAD+ — as a way of studying whether restoring NAD+ availability influences sirtuin activity and mitochondrial function. NAD+ itself is studied as a reference reagent in this body of work.

Research context

NAD+ is studied alongside other compounds in oxidative-pathway and metabolic research, including Glutathione and MOTS-C, which engage distinct but related cellular-energy and antioxidant pathways.

Velox Peptides supply information

Velox Peptides supplies NAD+ as a lyophilised powder at ≥99.5% HPLC-verified purity with a batch certificate of analysis available on request. For reconstitution, see the reconstitution calculator. Supplied strictly as a research reagent for in vitro use.

References & further reading

  1. Imai S, Guarente L. “NAD+ and sirtuins in aging and disease.” Trends in Cell Biology, 2014.
  2. Verdin E. “NAD+ in aging, metabolism, and neurodegeneration.” Science, 2015.

Summaries are paraphrased from the peer-reviewed literature. For full source citations, email veloxpeps@gmail.com.

Frequently asked questions

What is NAD+?
NAD+ (nicotinamide adenine dinucleotide) is a coenzyme central to cellular energy metabolism and a required substrate for sirtuin enzymes. Velox Peptides supplies it as a research reagent for in vitro use only.
What is the link between NAD+ and sirtuins?
Sirtuins are NAD+-dependent enzymes, so cellular NAD+ availability is studied as a regulator of sirtuin activity and related metabolic pathways.
What purity is Velox Peptides NAD+?
NAD+ is HPLC-verified at a minimum of 99.5% purity, with batch documentation available on request.
Is NAD+ legal to buy in the UK?
Yes — for in vitro research purposes. Velox Peptides supplies it solely as a research reagent, not for human or veterinary use.
Compliance statement. Velox Peptides supplies research reagents for in vitro use by qualified researchers. Every compound is sold strictly as a research reagent. No product is a medicinal product within the meaning of the Human Medicines Regulations 2012. No product has been evaluated by the MHRA or FDA. No product is intended for human or veterinary consumption, diagnosis, treatment, cure, or prevention of any condition. Any use outside lawful scientific research is outside the scope of sale. See our Research Use Policy and MHRA Statement.

All research summaries on this page are derived from publicly available peer-reviewed literature. Velox Peptides makes no therapeutic claims. For research use only.