NAD+ FAQ: Your Questions Answered
The questions below are the ones that come up specifically about NAD+, rather than general peptide questions that apply to everything.
In plain English
The big ones: whether it is a peptide (no), why alkaline conditions destroy it, why vials are so much larger, what hygroscopic means in practice, and the difference between NAD+ and NADH.
What NAD+ actually is
NAD+ is not a peptide, and that single fact governs everything about handling it. It is a coenzyme — think of it as a rechargeable battery that shuttles energy around inside cells. It is present in every living cell, was first identified in 1906, and almost every peptide habit is wrong for it.
Supplied for laboratory research use only — not for human or animal use.
Third-party tested by HPLC and LC-MS, ≥99% purity, with a Certificate of Analysis on every order. Ships across Canada.
Technical detail below
NAD+ — common questions
Is NAD+ a peptide?
No. It is a dinucleotide — two nucleotides joined by a pyrophosphate bridge — and it shares essentially no chemistry with the peptides in this catalogue. It appears alongside them because of overlapping research interest in cellular metabolism, not because of any structural relationship. Its handling rules are genuinely different.
Why is alkaline pH so damaging to NAD+?
The glycosidic bond linking nicotinamide to the ribose is base-labile and hydrolyses rapidly above neutral pH, releasing free nicotinamide and destroying the coenzyme. Acidic conditions, by contrast, are comparatively well tolerated — the opposite of what holds for peptides carrying acid-sensitive motifs.
Why are NAD+ vials so much larger than peptide vials?
Molar scale. NAD+ has a molecular weight of about 663 Da and is used at concentrations orders of magnitude higher than research peptides, which is why 500 mg vials are routine here while peptide vials are typically 5–20 mg.
What does hygroscopic mean in practice for NAD+?
It means the powder actively pulls water out of ambient air. A vial opened while still cold will condense atmospheric moisture onto its contents within minutes, which both starts hydrolysis and makes any weighed mass inaccurate. Warming the sealed vial to room temperature first is the single most useful handling habit for this compound.
What is the difference between NAD+ and NADH?
Oxidation state. NAD+ is the oxidised form and NADH the reduced form; the pair shuttles electrons through metabolism. They are distinguishable spectroscopically — NADH absorbs at 340 nm while NAD+ does not — which is the basis of the A260/A340 ratio check on a COA.
What NAD+ is studied for
Sirtuins consume NAD+ as a co-substrate, which links cellular NAD+ availability directly to their activity.
Its canonical role as the central redox carrier of cellular respiration.
PARP enzymes consume NAD+ during DNA damage response, a heavily studied competing demand.
A major driver of current research interest: measured NAD+ levels fall with age across tissues in animal models.
Summarizes published preclinical literature. Provided for research reference only; not a claim of efficacy or a description of human use.
More NAD+ reference
Lyophilized and reconstituted storage conditions, plus the practical working window.
Diluent selection, dissolution behaviour, and the calculator preset for this compound.
Which solvents work, why, and what abnormal dissolution behaviour indicates.
The specific chemical routes by which this molecule breaks down, and how to limit each.
Which assays are informative for this molecule, and what to actually check on its COA.
Compound-specific bench practices, and the errors most often made with this molecule.
What to inspect on arrival, and which conditions actually warrant rejecting a vial.
FAQ reference for other compounds
NAD+ is supplied strictly as a research chemical for in-vitro laboratory and research use only. It is not intended for human or animal consumption, diagnostic, or therapeutic use. This page is educational laboratory-handling reference information — not medical advice, not usage guidance, and not a protocol.