Posted March 15, 2026 in NAD+ therapy, wellness
NAD+ (nicotinamide adenine dinucleotide) injections have become increasingly popular in wellness Wellness clinics now promote NAD+ injections as a solution for fatigue, aging, brain fog, and recovery. Influencers and celebrities often highlight these treatments online. As a result, interest in NAD+ therapy has grown rapidly.
However, many of the claims surrounding NAD+ injections lack strong scientific support. Physicians and researchers continue to debate whether these treatments provide meaningful benefits at all. Even if NAD+ levels increase temporarily, the body quickly regulates them.
Understanding how NAD+ works can help patients make informed decisions.
What Is NAD+?
NAD+ stands for nicotinamide adenine dinucleotide. Every cell in the body uses this molecule during metabolism. It helps convert nutrients into energy inside the mitochondria. Cells also rely on NAD+ to support several repair processes.
Researchers have studied NAD+ for decades. Scientists know that NAD+ levels naturally decline as people age. That observation sparked interest in therapies designed to increase NAD+ levels.
Some researchers hoped that increasing NAD+ might improve energy production or cellular repair. This idea led to the development of NAD+ infusions and injections.
Unfortunately, raising NAD+ levels does not automatically translate into meaningful health improvements.
The Evidence Behind NAD+ Therapy
Few large human studies support the claims made about NAD+ injections. Most research focuses on compounds that the body converts into NAD+ rather than NAD+ itself.
Researchers often study substances such as:
• nicotinamide riboside (NR)
• nicotinamide mononucleotide (NMN)
• niacin (vitamin B3)
These compounds serve as NAD+ precursors. The body converts them through natural metabolic pathways.
Scientists have shown that these supplements can increase NAD+ levels in the bloodstream for short periods of time. Even so, researchers have not demonstrated that these increases improve aging, longevity, or physical performance.
Studies involving intravenous NAD+ remain limited. Physicians cannot confidently claim that NAD+ injections produce measurable health benefits.
NAD+ Levels Rise Only Temporarily
The body tightly regulates NAD+ metabolism. Cells constantly produce and consume NAD+ as part of normal metabolic activity. Because of this balance, NAD+ levels rarely stay elevated for long.
When someone takes an NAD+ supplement or receives an infusion, NAD+ levels may increase briefly. Soon after, the body returns those levels to baseline.
Researchers observe this pattern with both oral supplements and intravenous treatments. In other words, NAD+ elevation appears temporary regardless of the delivery method.
Temporary changes rarely lead to lasting improvements in health.
Oral NAD+ Precursors May Make More Sense
If NAD+ levels can increase at all, oral precursors likely represent the most biologically reasonable pathway. These compounds enter natural metabolic systems and convert into NAD+ gradually.
NMN and nicotinamide riboside follow pathways that cells already use every day. This approach aligns with normal physiology.
Injecting NAD+ directly bypasses those regulatory mechanisms. Marketing often portrays this shortcut as beneficial. In reality, bypassing natural pathways does not guarantee better results.
Current evidence suggests that oral precursors can raise NAD+ levels without injections or IV infusions. Even then, the increases remain temporary.
Side Effects of NAD+ Infusions
Many clinics advertise NAD+ infusions as safe and natural. However, patients frequently report uncomfortable symptoms during treatment.
Common reactions include:
• flushing
• nausea
• chest pressure
• headaches
• anxiety or restlessness
• rapid heart rate
Clinics often slow the infusion rate to reduce these symptoms. Some treatments last several hours for that reason.
These reactions highlight an important point. NAD+ infusions still affect the body in complex ways.
Feeling Better Does Not Prove Long-Term Benefit
Patients sometimes report improved energy or mood after NAD+ treatments. That response does not prove the therapy produces lasting health benefits.
Many substances temporarily increase alertness or energy. Caffeine provides a simple example. Short-term stimulation does not equal improved long-term health.
Medical treatments require consistent evidence from controlled studies. Researchers must demonstrate clear benefits across large groups of patients.
NAD+ injections have not yet reached that level of evidence.
NAD+ Injections in Northern Virginia
Many wellness clinics throughout Northern Virginia and the DMV (Washington DC–Maryland–Virginia region) advertise NAD+ injections for energy, anti-aging, and recovery. Patients in Ashburn, Leesburg, Sterling, and Loudoun County often ask whether these treatments actually work.
At Mountcastle Medical Spa & Laser Center in Ashburn, Virginia, our providers focus on treatments supported by clinical research and patient safety. Patients interested in evidence-based aesthetic treatments can learn more here:
Many patients who inquire about NAD+ therapy ultimately pursue treatments with stronger clinical evidence such as Botox, dermal fillers, or Morpheus8 skin rejuvenation.
• Botox: https://www.mountcastlemedicalspa.com/botox-ashburn-va/
• Dermal Fillers: https://www.mountcastlemedicalspa.com/dermal-fillers-ashburn-va/
• Morpheus8: https://www.mountcastlemedicalspa.com/morpheus8/
FAQ: NAD+ Therapy
Do NAD+ injections actually work?
Current research has not demonstrated clear clinical benefits from NAD+ injections. Some studies show temporary increases in NAD+ levels, but long-term health improvements remain unproven.
Are NAD+ infusions safe?
Most patients tolerate NAD+ infusions, but side effects such as nausea, flushing, chest tightness, and anxiety can occur.
Are oral NAD+ supplements better than injections?
If NAD+ levels can increase at all, oral precursors such as NMN or nicotinamide riboside may be more consistent with the body’s natural metabolic pathways.
How long do NAD+ levels stay elevated?
Research suggests NAD+ levels rise temporarily with both oral supplements and intravenous treatments before returning to baseline.
About the Author
This article was written by Dr. Timothy Mountcastle, Double Board-Certified Plastic Surgeon and Medical Director of Mountcastle Medical Spa & Laser Center in Ashburn, Virginia. Dr. Mountcastle specializes in aesthetic medicine, injectables, and advanced laser treatments.
Learn more about Dr. Mountcastle here:
The Bottom Line
NAD+ remains an important molecule in human biology. Scientists continue to study its role in metabolism, aging, and cellular repair.
Despite growing interest, strong clinical evidence supporting NAD+ injections does not yet exist. Even when NAD+ levels rise, those increases appear temporary with both oral supplements and intravenous treatments.
Patients should approach emerging wellness trends cautiously. Evidence-based medicine remains the best guide when choosing treatments that support long-term health and safety.
