NAD+ (nicotinamide adenine dinucleotide) is a coenzyme found in every cell of your body. It plays a central role in converting nutrients into cellular energy and supports processes involved in DNA repair and cellular maintenance.
NAD+ levels naturally decline with age — and that decline has been linked in research to many of the biological changes associated with aging. NAD+ therapy aims to replenish those levels, and injectable NAD+ is one of the most direct ways to do it.
Why NAD+ matters
Inside your cells, NAD+ is essential for the mitochondria — the structures that produce energy. It also serves as a substrate for enzymes called sirtuins and PARPs, which are involved in DNA repair, cellular stress responses, and metabolic regulation.
Because NAD+ is involved in so many fundamental processes, declining levels are thought to affect energy, recovery, cognitive function, and metabolic health. This is the rationale behind NAD+ replenishment strategies in longevity medicine.
Why injections instead of oral supplements
NAD+ itself is poorly absorbed when taken orally — it is largely broken down during digestion. Oral precursors like NR (nicotinamide riboside) and NMN (nicotinamide mononucleotide) are popular supplements that the body can convert into NAD+, but conversion efficiency varies between individuals.
Injectable NAD+ bypasses the digestive system entirely, delivering the coenzyme directly. Subcutaneous NAD+ injections can be self-administered at home with instruction — a more practical option than IV infusions, which require clinic visits and hours-long drip sessions.
What NAD+ therapy is studied for
Research into NAD+ is active and ongoing. Areas of scientific interest include:
- Cellular energy production and metabolic function
- DNA repair and cellular maintenance pathways
- Cognitive function and mental clarity
- Recovery and resilience to physical stress
- Healthy aging processes at the cellular level
What to expect from a supervised program
A physician-supervised NAD+ program starts with a health evaluation. If NAD+ therapy is appropriate, your medication is prepared by a licensed compounding pharmacy and shipped to you with supplies and clear instructions for at-home administration.
Individual responses vary. Some patients report noticing differences in energy or mental clarity early in a protocol, while effects on recovery and wellbeing are typically assessed over weeks. Your physician will recommend a dosing schedule and check in on your progress.
Safety and tolerability
NAD+ therapy is generally well tolerated. The most commonly reported effects with injections are mild and temporary — such as flushing, warmth, or nausea if administered too quickly. As with any therapy, a physician should review your health history first, and your medication should come from a licensed pharmacy with pharmaceutical quality standards.
Frequently asked questions
Explore your options with a physician
If this therapy sounds relevant to your goals, the next step is a clinical evaluation with a licensed physician.
Keep reading
This guide is for educational purposes only and does not constitute medical advice. Compounded medications are not FDA-approved and are prepared by licensed compounding pharmacies pursuant to a valid prescription. Always consult a licensed physician before starting any treatment.