What is NAD+?
NAD+ (nicotinamide adenine dinucleotide) is a coenzyme found in every living cell that helps convert food into cellular energy and supports enzymes involved in DNA repair and metabolism. It is offered in wellness settings as an IV, an injection, or oral precursors like NR and NMN. NAD+ is investigational and not FDA-approved to diagnose, treat, cure, or prevent any disease.
The biology: what NAD+ does in your cells
NAD+ is a coenzyme — a helper molecule — present in every cell. Its best-understood job is in energy metabolism: NAD+ shuttles electrons during the reactions that turn the food you eat into ATP, the cell's usable energy currency. Without adequate NAD+, cells cannot efficiently generate energy.
NAD+ also serves as a substrate (a consumable input) for several families of enzymes, including sirtuins and PARPs, that participate in DNA repair, gene regulation, and the cellular stress response. Because these enzymes use up NAD+ as they work, cells continuously recycle and resynthesize it.
NAD+ and aging: what research is exploring
Laboratory studies have observed that tissue NAD+ levels tend to decline with age in various organisms, and researchers are actively investigating whether raising NAD+ availability affects cellular processes linked to aging. Much of this work is in cell cultures and animal models; human data are early and mixed.
This is an area of genuine scientific interest, not settled medicine. No NAD+ product has been shown in adequate, well-controlled human trials to slow aging, extend lifespan, or reverse age-related decline, and no such outcome should be assumed. NAD+ is investigational.
Forms: IV, injection, and oral precursors
NAD+ and its precursors are offered in several formats in wellness settings. They differ in how they are administered and in how much human research supports them.
- Intravenous (IV) NAD+ — NAD+ delivered directly into a vein, typically over a slow infusion. Used in wellness settings; not FDA-approved for any medical indication.
- Subcutaneous or intramuscular injection — smaller doses given under the skin or into muscle, sometimes for at-home protocols under provider oversight.
- Oral precursors (NR and NMN) — nicotinamide riboside and nicotinamide mononucleotide are precursor molecules the body can convert toward NAD+. NR is marketed as a dietary supplement; the FDA has stated NMN is excluded from the dietary supplement definition, and its regulatory status is unsettled.
- Regardless of form, these are wellness offerings, not approved treatments for any disease.
The honest evidence state
Human research on NAD+ precursors has shown that oral NR and NMN can raise blood NAD+ markers and are generally well tolerated in short studies. What remains unproven is whether that increase produces meaningful clinical benefits — the leap from a lab marker to a health outcome has not been established in robust trials.
We describe NAD+ the way the evidence supports: as an investigational option used in wellness settings, not a therapy proven to prevent or treat disease. Health claims about aging require competent and reliable scientific evidence, and that bar has not been met for anti-aging or longevity outcomes. This page is educational and not medical advice; a licensed provider determines whether any protocol is appropriate for you.
What does NAD+ actually do?
NAD+ is a coenzyme in every cell. It helps convert food into cellular energy (ATP) and acts as a substrate for enzymes involved in DNA repair and metabolism. It is essential to normal cell function.
Does NAD+ slow aging or extend lifespan?
There is no adequate human evidence that NAD+ or its precursors slow aging, extend lifespan, or reverse age-related decline. It is investigational and not FDA-approved to diagnose, treat, cure, or prevent any disease. Claims otherwise are not supported.
What is the difference between IV NAD+ and oral NR or NMN?
IV NAD+ delivers the coenzyme directly into a vein. NR and NMN are oral precursor molecules the body converts toward NAD+. Human data are more established for oral precursors' ability to raise NAD+ markers, though clinical benefit remains unproven for all forms.
Is NAD+ approved by the FDA?
No. NAD+ therapy is not FDA-approved to diagnose, treat, cure, or prevent any disease. It is offered in wellness settings. Oral NR is sold as a dietary supplement; the FDA has stated NMN is excluded from the dietary supplement definition.
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