Name: NAD+ 500mg (10 Vials / Kit)
Brand: HK Peptide
SKU: HK-NJ500
Price: 90.00 USD
Availability: InStock

What is NAD+ (Nicotinamide Adenine Dinucleotide)?

NAD+ is a dinucleotide coenzyme built from an adenine nucleotide and a nicotinamide nucleotide, present in all living cells as a required cofactor for hundreds of enzymatic reactions. Cellular NAD+ levels are well documented to decline with age, which has driven substantial research interest.

How it is understood to work

NAD+ functions as an electron carrier in glycolysis, the citric acid cycle and oxidative phosphorylation, cycling between its oxidized (NAD+) and reduced (NADH) forms. It is also a required substrate for sirtuin enzymes and PARP proteins, connecting it mechanistically to gene regulation, DNA repair and mitochondrial signaling.

Research status

NAD+ biology is studied across aging, neurodegeneration, mitochondrial dysfunction, metabolic disease and cellular stress-response research, using both direct NAD+ administration and precursor compounds such as NMN and NR as comparators. The basic biochemistry is well established, but translation of NAD+ supplementation into proven clinical outcomes remains an active and unsettled area of research.

This listing: HK Peptide NAD+ (Nicotinamide Adenine Dinucleotide)

Brand: HK Peptide
Kit: 10 vials
Price per vial: $9.00
Other strengths: NAD+ 100mg $50.00
Also sold by: Uther Peptide Nad+ 500mg $105.00

Lab testing

There is no public lab report for this listing yet. We can ask the brand for the batch COA before you order. Many buyers also split an independent HPLC test with others who bought the same batch.

Request the batch COA · How group testing works

Bought through escrow: the brand is only paid after you confirm delivery. If the parcel never arrives, or an independent test shows the wrong compound or a significant under-fill, open a claim before releasing payment.

Specifications

Compound: NAD+ (Nicotinamide Adenine Dinucleotide)
Also known as: NAD, Coenzyme I
Class: Essential cellular coenzyme (non-peptide)
Form: Lyophilized (freeze-dried) powder
Per vial: NAD+ 500mg
Molecular formula: C₂₁H₂₇N₇O₁₄P₂
Molecular weight: 663.4 g/mol
Stated purity: ≥99% (HPLC)
Appearance: White lyophilized powder

Handling & storage

Supplied as a lyophilized powder that is notably light- and temperature-sensitive; store unopened vials at -20 C protected from light, and once reconstituted with bacteriostatic water keep refrigerated and use promptly per the study protocol, as NAD+ solutions can degrade over time even under refrigeration.

Questions

How does NAD+ differ from NMN or NR as a research material?

NMN and NR are smaller precursor molecules that cells convert into NAD+ through salvage-pathway enzymes, whereas this product is the NAD+ coenzyme itself; researchers choose between them depending on whether they want to study direct NAD+ availability or precursor-driven biosynthesis.

Why is NAD+ described as sensitive to degradation?

The dinucleotide bond and reduced cofactor forms are chemically labile to heat, light and pH shifts, making solutions more prone to breakdown over time than many lyophilized peptides, which is why storage conditions and use-by timing matter.

For laboratory research use only. Not for human or veterinary use. Nothing on this page is medical advice.