Reading a NAD+ Certificate: Why It Is Not a Peptide Report

A NAD+ report looks thinner than a peptide report, and people read that as a gap. Usually it is not. NAD+ is not a peptide, so several of the lines you expect on a peptide certificate do not apply to it, and one line that peptide reports rarely need matters here a great deal.

A real lot

Our current NAD500 lot is Janoshik report #125482, lot NAD260327:

• Content: 532.45 mg / 531.25 mg / 533.64 mg, against a 500 mg label
• No purity figure is reported for this lot.

Three vials, 106–107% of label, spread under 0.5%. As a fill that is tight and comfortably above label.

Why there is no purity line, and why that is not evasion

NAD+ is a dinucleotide — a small molecule of around 663 g/mol, not a chain of amino acids. “HPLC purity” as peptide reports use the term is a peptide convention: percentage of total peak area at a wavelength chosen for the peptide bond. Applying that number to a nucleotide is not wrong so much as not meaningful in the same way, and a laboratory that quantifies content against a reference standard has answered the question that matters: how much NAD+ is in the vial.

So the honest reading of a content-only NAD+ report is: the amount is measured, the identity is implied by the method, and anything else was not tested. If a supplier prints “99% purity” beside a NAD+ product with no report showing that figure, ask which method produced it. On our product pages, where a lot’s report carries no purity figure, the field is left blank rather than filled with a number the report does not support.

What actually threatens a NAD+ vial

This is where NAD+ differs from the peptides in the same catalogue, and it is worth knowing before the vial is opened:

• It is strongly hygroscopic. The solid pulls water out of room air quickly. A vial opened cold, so that moisture condenses inside, is the classic way to spoil it — let it reach room temperature first, every time.
• It is unstable in solution, and the instability is pH-dependent. NAD+ degrades faster as pH rises; it is at its least unhappy slightly acidic. A reconstituted NAD+ solution is a short-lived thing, measured in days under refrigeration rather than weeks.
• Degradation is not always visible. Peptides often announce trouble by going hazy. A NAD+ solution can lose content while still looking clear.

The general handling rules in fridge, freezer or room temperature apply, with the moisture point weighted more heavily than it is for a peptide.

Working out concentration

With no net peptide content figure — and for NAD+ the equivalent would be a purity-corrected content — the measured milligrams are what you have. For this lot that is about 532 mg per vial rather than the labelled 500, which is a 6% difference and large enough to carry through a dilution series. The stock concentration calculator handles the arithmetic; use the measured figure, not the label.

Checks

• Lot number on the report matches the vial: NAD260327 here.
• The report opens at the laboratory’s own site — #125482 is on our lab results page with its verification link.
• Content is given per vial in milligrams, from more than one vial.
• Any purity or endotoxin claim is backed by a figure on the report, not asserted on the listing.

The product page is NAD500 — NAD+ 500mg.

All products referenced on this site are supplied for laboratory research use only, and are not for human or veterinary use.