NAD is one of the most important molecules in the cell, and in the context of longevity it is talked about almost more than any other. People search for it in different ways: "what is nad", "nad drips", "nad supplement". Let us go through it calmly and precisely: what NAD is, why its level falls with age, in what forms it exists, and what to look at if you are choosing NAD for research.
What NAD is
First, precision: NAD is not a peptide but a coenzyme (nicotinamide adenine dinucleotide). That is, it is not a chain of amino acids but a dinucleotide that works as a universal "switch" in the metabolism of every cell.
NAD exists in two forms, oxidized (NAD⁺) and reduced (NADH). The transition between them is essentially how the cell moves electrons and extracts energy from food.
What NAD is for: two big roles
- Energy metabolism. NAD⁺/NADH are central participants in glycolysis, the Krebs cycle and oxidative phosphorylation in the mitochondria. Without NAD the cell simply cannot efficiently produce ATP (adenosine triphosphate), the body's "fuel".
- Signaling enzymes. NAD⁺ is a substrate (a consumable) for a whole class of enzymes: sirtuins (linked to the regulation of aging and metabolism), PARP (poly ADP-ribose polymerase, DNA repair) and CD38. It is through sirtuins that NAD ended up at the center of longevity research.
Why NAD interests aging researchers
The key fact: NAD⁺ levels decline with age. There are several reasons, consumption of NAD⁺ by enzymes like CD38 and PARP grows (as damage accumulates), while synthesis does not keep up. The hypothesis under active study: maintaining NAD⁺ levels may affect mitochondrial function and processes linked to aging.
That is why NAD is often mentioned alongside its precursors, NMN (nicotinamide mononucleotide) and NR (nicotinamide riboside): these are the molecules from which the body builds NAD⁺ "from the inside". A separate direction is inhibitors of the NNMT (nicotinamide N-methyltransferase) enzyme (for example, 5-amino-1MQ), studied precisely for their ability to spare the NAD⁺ pool.
Forms of NAD
| Form | Feature |
|---|---|
| Intravenous ("NAD drips") | Bypasses the GI tract; a popular format in longevity clinics |
| Injectable (subcutaneous/IM) | A more compact format than a drip |
| Oral (NAD / NMN / NR) | The simplest, but the bioavailability of NAD itself is limited, so precursors are often taken instead |
Searches for "nad drips" refer specifically to the intravenous format used in medical and aesthetic clinics under specialist supervision.
Buying NAD: what to look at
If you are choosing NAD for research purposes, the criteria are standard for a quality substance:
- An independent COA (Certificate of Analysis, a lab certificate for the batch) for every batch, a specific document, not general words about quality.
- Purity by HPLC (high-performance liquid chromatography, a method of purity testing) as confirmation of identity and the absence of impurities.
- Correct form and storage of the lyophilized powder (NAD is sensitive to moisture and temperature).
- Transparent origin, not "the cheapest with no documents".
Longeva supplies NAD as a research substance with a COA for every box, a reagent for laboratory research into metabolism and the biology of aging, not a medicine or a food supplement. Specifications and availability on the product page, a detailed breakdown of the molecule in the monograph. How to correctly reconstitute a lyophilized powder we explained in a separate article.
Summary. NAD is a coenzyme (not a peptide), central to energy metabolism and to the work of sirtuins, PARP and CD38. Its level falls with age, and that is exactly why NAD and its precursors (NMN, NR) have become one of the main directions of longevity research. It exists in intravenous ("drips"), injectable and oral forms. For research purposes the main things are an independent COA, purity by HPLC and correct storage; that is exactly how Longeva supplies NAD.
See also: Nicotinamide riboside (NR): NAD⁺ research results.
