The questions below are the ones researchers ask most about storing, mixing and handling NAD+. Each answer reflects its structure, a dinucleotide of nicotinamide and adenine joined by a pyrophosphate bridge, rather than a peptide sequence, and links to the fuller page where there is one.
How long does NAD+ last in the fridge after mixing?
Mixed with bacteriostatic water and kept at 2 to 8 °C in the dark, NAD+ is best dated at mixing. Our storage guidance treats 4 weeks as the point backed by reagent data, because NAD+ is not a peptide and the 8 to 12 week peptide window does not automatically carry over. The full guidance is on how long NAD+ lasts.
How long does unmixed NAD+ powder last?
The sealed lyophilised vial lasts much longer than any solution, at 2 to 8 °C for everyday storage or frozen for long-term holding. Hydrolysis needs water, so the dry cake has little to work with. Keep it sealed, because the powder is highly hygroscopic. Days at room temperature in transit are not a concern.
Is NAD+ a peptide?
No. NAD+ is a dinucleotide coenzyme: ribosylnicotinamide 5′-diphosphate coupled to adenosine 5′-phosphate by a pyrophosphate linkage (PubChem CID 5892). It has no amino acids, so peptide degradation routes do not apply. The bench habits are the same as for peptides. More in NAD+ is not a peptide.
What does NAD+ break down into?
In solution it slowly hydrolyses at the bond joining nicotinamide to its ribose, giving nicotinamide and ADP-ribose. Both are colourless, so most loss is invisible and the mixing date matters more than appearance. Warmth and alkaline pH speed the reaction, and cold storage slows it.
Why does pH matter for NAD+?
The oxidised form, NAD+, undergoes base-catalysed degradation at high pH, while the reduced form, NADH, is the one destroyed by acid (Wolfe et al., Molecules, 2024). Bacteriostatic water sits on the mildly acidic side, which suits NAD+. Nothing alkaline belongs in the vial.
What do you mix NAD+ with?
Bacteriostatic water, which is sterile water with 0.9% benzyl alcohol so a refrigerated vial can be accessed more than once. NAD+ is very soluble in water and needs no acid, buffer or other solvent. Buffers can change its stability sharply, so plain bacteriostatic water is the simplest choice. The reasons are on the NAD+ solubility guide.
How much bacteriostatic water goes in a 500 mg NAD+ vial?
There is no single correct volume. With 5 mL a 500 mg vial gives 100 mg/mL; with 2.5 mL it gives 200 mg/mL. More water spreads the same amount through a larger volume, so write the chosen concentration on the vial. The tables and calculator are on the NAD+ reconstitution page.
Why is my NAD+ cloudy after mixing?
NAD+ is very soluble, so brief cloudiness is usually trapped air from adding water too fast, and it clears within a few minutes. Haze, particles, yellowing or darkening that persist or appear later point to warm storage, freezing or contamination, and the solution is discarded. More in why peptides gel or go cloudy.
Can you freeze mixed NAD+?
The sealed lyophilised vial can be frozen for long-term storage. A mixed vial or spray that will be used again should not go through freeze-thaw cycles. Laboratories that need frozen solution divide it into single-use aliquots and thaw each one once.
Does NAD+ need to be kept out of the light?
NAD+ absorbs ultraviolet light strongly, with a peak near 260 nm. No study of light-driven loss in a research vial was found, so dark storage is a cautious default rather than a measured need. Keep the vial or spray boxed in the fridge, which also keeps it away from warmth, a proven accelerator.
All products supplied by Vistara Labs are intended for laboratory research use only. They are not drugs, are not approved for human or veterinary use, and are not intended to diagnose, treat, cure or prevent any condition. Nothing on this page constitutes medical advice or guidance for use in humans.
