What is NAD+ and what is it studied for?

NAD+ is the oxidized form of nicotinamide adenine dinucleotide, the central hydride-carrying coenzyme in cellular redox reactions. In research it is a reference probe for mitochondrial electron transport, sirtuin deacetylase activity, PARP-family DNA-repair enzymes, and the NAD+/NADH ratio as a cellular energy-state readout. It is supplied strictly for laboratory research as a reactive biological cofactor.

How is NAD+ purity verified?

Every batch ships with an independent ISO/IEC 17025 Certificate of Analysis covering HPLC purity at 214 nm, mass-spec identity confirmation, endotoxin by LAL, and residual solvent against ICH Q3C limits. The batch number printed on the vial label resolves against the public COA at /verify so a vial can be cross-checked against the lab record in one step.

How should NAD+ be handled and stored?

NAD+ is supplied lyophilized and is best stored sealed at minus 20 degrees Celsius to preserve the oxidized form. Reconstituted NAD+ is more labile — convert freshly, keep on ice during the assay, and protect from light. Repeated freeze-thaw cycles degrade the cofactor, so aliquot the reconstituted material into single-use vials before storage.

Is NAD+ legal to import for research?

NAD+ is sold as a research-grade cofactor. Import rules vary by jurisdiction and change often — the buyer is the importer of record and is responsible for confirming that the destination permits the imported material. We cancel and refund any order bound for a destination that has changed status before dispatch.

Why is NAD+ supplied lyophilized rather than in solution?

In solution NAD+ hydrolyzes over time, shifting the cofactor pool toward inhibitors of NAD+-consuming enzymes. Lyophilization locks in the oxidized form at the assay date and avoids the cold-chain burden of shipping a wet, labile cofactor. Most users reconstitute fresh on the day of the assay.

NAD+ — Nicotinamide Adenine Dinucleotide (oxidized) — research peptide

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