NAD+ Side Effects: Where the Preparation Is the Risk

Three sources are usually offered, and they are worth separating because they are not equally useful.

The first is the oral precursor trial record in humans. Those are real controlled studies in people, and they report tolerability for a capsule swallowed and converted internally. Reading them as a safety profile for an injected preparation transfers a finding across a route change and a manufacturing change at once, which is exactly the substitution this compound invites and the one to refuse.

The second is mechanistic and animal work, in mice and in cultured cells. That literature describes what the molecule does in systems, and it does not produce a list of effects in people. It never has, for any compound, and it is not close to doing so here.

The third is anecdote from users and from clinics, which carries no denominator. Nobody knows how many preparations were made, how many produced nothing worth posting, or what mass was actually delivered in any of them, because as covered elsewhere on this site the posts almost never state a fill volume.

None of those three is a side effect list for injected NAD+. The honest statement is that the record for the injected form is thin, and that absence of a published list is not evidence of an absence of effects.

Here is the hazard specific to this compound, and it is entirely arithmetic. Anyone who has been handling peptide vials has a trained reading of a syringe, and that training is calibrated to concentrations two orders of magnitude below what NAD+ produces.

A 5 mg vial in 2 mL gives 2.5 mg per mL. Ten units on a U-100 syringe is 0.1 mL, so the draw is 250 mcg. A 1000 mg vial in 5 mL gives 200 mg per mL. Ten units is still 0.1 mL, and now the draw is 20 mg. Same barrel, same mark, same appearance, eighty times the mass.

The syringe cannot warn anyone about this. It reports volume and it reports volume correctly in both cases. Nothing in the visual field distinguishes the two draws, because the liquid is clear in both and the reading is identical. The only defence is that the concentration is recomputed and written down every time the container changes, which is a discipline rather than a feature.

The other arithmetic error at this scale is worth noting precisely because it does not run the frightening way.

Concentration is usually taken as labelled mass over water added, which assumes the powder occupies no space. At an assumed solid density of 1.5 g per mL, offered as an assumed input so the arithmetic can run rather than as a measured property of any product, 1000 mg of solid displaces about 0.67 mL. Add 10 mL of water and the true volume is nearer 10.67 mL, so the real concentration is about 94 mg per mL where the calculation said 100.

Every draw from that vial therefore delivers about one part in fifteen less than intended. The error is systematic, it is invisible at the syringe, and it under delivers. That makes it a measurement failure rather than a hazard, but it is still a failure: an account reporting 50 mg was reporting something nearer 47, and the vial lasts slightly longer than the portion count suggests.

A peptide draw is a tenth of a barrel. An NAD+ portion is often the whole barrel or more, and volume is a handling fact in its own right.

At 100 mg per mL a 50 mg portion is 0.5 mL, half a U-100 syringe. At 50 mg per mL the same portion is a full 1 mL barrel with no headroom, and a 100 mg portion at that concentration is 2 mL, which is two separate draws. Compare that with 0.1 mL for a typical peptide portion and the injected volume is ten to twenty times larger.

The consequence for a list of effects is that any local reaction is a reaction to a substantially larger volume of liquid than the rest of this site ever discusses, and volume is a variable the accounts never state either. If any reported experience is volume related or rate related, the reports as written cannot show it, because they contain neither figure.

One more thing arithmetic can supply is exposure of the container itself.

A 1000 mg vial drawn in 50 mg portions is twenty portions and twenty punctures of the stopper. Drawn in 25 mg portions it is forty. The preserved water convention gives about four weeks of multi draw use, used here as a stated input, so those punctures are compressed into a fixed window: at a daily interval, twenty to twenty eight punctures inside twenty eight days.

The portion size that looks like a conservative choice, the smaller one, doubles the puncture count and the number of handling events without changing the material available. That is the opposite of the usual intuition, and it is decided at purchase when the container size is chosen.

Four of the seven rows are checkable with a calculator and a pen, and they are all preparation rows. The three that are not checkable are the ones about the substance and the container, and they are the rows a purchase decision actually turns on.