Supplement labels are written to be skimmed, and the biggest number usually wins the skim. Here is how to read an NADH label slowly, including ours.
1. Per serving is not per capsule
"100 mg per serving" can mean one capsule or three. Find the serving size line first. A bottle of 30 capsules with a three-capsule serving lasts ten days, not a month, and the price per day changes accordingly.
2. The form
NADH, NAD+, and the precursors sold under names like NR or NMN are not the same molecule. Precursors are raw material your body has to convert, in several steps, before any of it becomes NADH. NADH itself is the finished, reduced form, the one that carries energy into the process your cells use to make ATP. A label that says "supports NAD" without naming the form is not telling you what is inside.
3. Purity
"NADH" on the front does not tell you how much of the powder inside is actually NADH. Ask for the purity, and ask who measured it. PureNADH is 99% pure, and every batch is tested by an independent laboratory using HPLC. We do not grade our own homework.
4. Stability
NADH is fragile. Oxygen, moisture, light and stomach acid all break it down, and no label can show you how much of the stated amount survives the shelf and the trip through your stomach. Look for a stated method. If the label is silent on stabilization, assume the number on the front is a starting figure, not what reaches you.
5. Fillers and blends
A "proprietary blend" hides the amounts of each ingredient behind one total. For a single-molecule product there is no reason for that. PureNADH has one active ingredient, in a two-piece plant-based HPMC capsule, and nothing to blend.
6. The amount itself
Is 100 mg a lot? There is no agreed "right" amount, and much of the early research on NADH used smaller daily amounts. We chose 100 mg for a reason that has nothing to do with the biggest number on the shelf: it lets a single capsule, once a day, deliver a meaningful amount of the molecule, so the routine stays simple enough to keep. More is not automatically better. If you are sensitive to supplements, taking medication, pregnant or nursing, talk to a healthcare professional before you start, and start with your own tolerance.
The short version: read the serving line, name the form, ask for the purity and the stabilization method, and only then compare the number. The Science page shows what is in a PureNADH capsule and why. Is 100 mg too much? goes deeper on the amount.
