What Is NAD IV Therapy?
NAD plays a central role in cellular energy metabolism (converting nutrients to energy), DNA repair, immunity, and aging. It's also essential to the citric acid cycle, the metabolic process by which cells generate ATP, the body's primary energy currency.
NAD exists in two forms: NAD+ (oxidized) and NADH (reduced), with NAD+ being most associated with energy production and cellular repair. This explains why it's used as a regenerative therapy for many longevity- and wellness-focused purposes.
Conventional medicine largely addresses the age-related decline of our bodies through medication management: statins for cholesterol, metformin for blood sugar, and SSRIs for mood, for instance. NAD+ therapy aims to target cellular energy metabolism and your cells' ability to repair before damage becomes disease.
IV NAD+ is meant to increase levels in the blood, which research suggests can decline significantly with age (potentially up to 50% by midlife). Low NAD levels are associated with fatigue, increased inflammation, and metabolic dysfunction.
While there's been an awareness of NAD since the early 1900s, its medical uses began in the late 1960s. The first clinical protocol was developed in 2001 for patients with acute withdrawal symptoms from opioids and alcohol.
Its mainstream consumer interest has grown over the last decade, as people have started seeking out interventions for living longer, and NAD IV therapy is more accessible now through med spas and mobile options.
How Does NAD IV Therapy Work?
NAD+ IV therapy delivers NAD+ directly into the bloodstream, bypassing the digestive system and causing plasma levels to rise. One study found an increase of 400% above baseline by the end of the infusion (Grant et al., 2019).
Because NAD+ is a large molecule that doesn't cross cell membranes easily, it's thought to be broken down into smaller precursor molecules that enter cells and then get reassembled into NAD+ once inside.
This is also why some people aren't sure about the need for IV therapy, as the body may go through the same process regardless of the delivery route. Plus, the evidence base for oral precursors like NR and NMN is currently stronger in human trials.
Once reassembled inside cells, NAD+ activates key enzymes: sirtuins (which regulate DNA repair, inflammation, and gene expression), PARP enzymes (involved in detecting and repairing DNA strand breaks), and CD38 (relevant to immune function and inflammation) (Imai & Guarente, 2014).
Sessions typically last two to six hours and are offered primarily through wellness clinics.
Who Does NAD IV Therapy Help?
Most people who seek NAD+ IV therapy fall on a spectrum between having a genuine clinical need and general wellness interest.
Those most likely to benefit include people with measurably depleted NAD+ levels, older adults whose decline is documented, people in addiction recovery, and those with fatigue conditions that have mitochondrial links.
NAD+ therapy isn't a standalone intervention. Overconsumption, alcohol use, chronic infections, sleep deprivation, and toxin exposure all accelerate NAD+ depletion as these things put wear on the body from the inside out.
Addressing these foundational drains through nutrition, fasting, exercise, and toxin reduction preserves NAD+ and enhances the potential benefits of supplementation. Think of NAD+ therapy as seeds; the soil still has to be prepared and in good condition.
Common Uses
Well-established or clinically grounded uses include:
Addiction recovery, particularly withdrawal from opioids and alcohol
Age-related fatigue and metabolic decline in older adults with documented NAD+ depletion
Adjunct support during post-illness recovery, including long COVID, where mitochondrial dysfunction and fatigue are common
Experimental or off-label uses (plausible rationale, limited human evidence) include neurodegenerative disease support (like Parkinson's and Alzheimer's), cardiovascular support (like heart failure), athletic performance and recovery, and general wellness "biohacking" goals.
What the Evidence Supports
IV Infusion Raises Plasma NAD+
Studies confirm that IV infusion produces a large, rapid rise in blood NAD+ levels (Grant et al., 2019). This is one of the few things about IV delivery specifically that has been directly measured.
Early Promise for Cardiovascular and Metabolic Markers
Early human studies have shown trends toward lower blood pressure, reduced inflammatory markers, and better mitochondrial function.
One randomized controlled trial found IV NAD+ improved heart function and improved certain markers in heart failure patients (Yu et al., 2025). Another found that an NMN formulation safely reduced LDL, body weight, and diastolic blood pressure in overweight middle-aged and older adults (Pencina et al., 2023).
Oral NAD+ Precursors Have More Evidence
Oral supplements (particularly NR and NMN) have been more consistently studied in humans. An analysis of more than 25 clinical trials confirms NR is efficiently absorbed and converted into NAD+ (Damgaard & Treebak, 2023).
A notable randomized controlled trial showed that NMN supplementation increased insulin sensitivity in prediabetic postmenopausal women (Yoshino et al., 2021). For those interested in raising NAD+ levels, NAD taken orally currently has more evidence than IV administration.
Beneficial for Addiction Recovery
Addiction has the longest track record when it comes to IV NAD therapy being used to replenish the levels in cells depleted by chronic substance use.
Where the Evidence Is Limited
The IV Delivery Mechanism
A systematic review concluded that IV NAD+ shows promise but found only a small number of adequate trials and called for long-term human studies (Braidy and Liu et al., 2020).
How Long Its Effects Last
IV NAD+ clears quickly from the body. One pilot study found levels didn't begin rising until two hours into a six-hour infusion, with increased urinary excretion suggesting minimal uptake of NAD by the tissues (Grant et al., 2019). Whether repeated infusions produce a cumulative benefit is unknown.
Anti-Aging and Longevity Claims
The underlying mechanisms (sirtuin activation, DNA repair) are real but demonstrated primarily in test tube and animal models. NAD+ supports cellular processes; it does not reverse aging.
Brain Health Benefits
Brain function claims are among the most marketed for NAD but are also the most weakly supported by evidence. The NADPARK Phase I trial found NR well-tolerated with mild clinical improvement in Parkinson's patients, but more research is needed (Brakedal et al., 2022).
Overall, no large-scale human studies have confirmed the outcomes most prominently marketed for IV NAD+ therapy. This doesn't mean those effects don't exist, but it does mean they haven't been rigorously tested yet.
Safety and Regulation
NAD+ IV therapy is not FDA-approved for any medical condition and has no standard dosing or established safety profile. Regulation varies by country and by state within the US.
Common side effects include:
Nausea
Flushing
Chest tightness
Headache
Muscle cramping
Fortunately, these typically resolve when the infusion rate is slowed for most people. In less clinical (more casual) settings, risks include infection, vein irritation, and air embolism (dangerous air pockets in the bloodstream). Long-term safety remains unknown with repeated use.
Caution is recommended for people with a history of hormone-sensitive cancers, active autoimmune conditions, or serious infections, and those who are pregnant or breastfeeding, largely because of a lack of research.
Speak with your healthcare provider before pursuing treatment, particularly if you have an existing health condition.
The Experience
Before your session, expect a consultation covering your history, medications, and goals. You'll typically fast for a few hours beforehand, avoid alcohol for several days, and prioritize hydration. Once the IV is placed, the solution drips slowly over several hours, so bring something to read or listen to.
Some people experience mild side effects during the infusion, but these usually resolve by slowing the drip rate. Most people resume normal activities the same day, though some feel more tired afterward.
A temporary boost in mood or energy in the days following is commonly reported, but transformative results from a single session are not the norm. Benefits are cumulative, context-dependent, and most meaningful when foundational health habits are already in place.
Sessions are self-pay, typically $200 to $1,000 each. Oral NAD+ supplements are significantly cheaper and, for many people, make more sense as a starting point.
The Future of NAD IV Therapy
The trajectory of NAD IV therapy is encouraging, but more rigorous testing is needed. Major ongoing trials are focused on neurodegeneration. The NOPARK Phase II trial is evaluating NR in 400 early Parkinson's patients, while NADAPT is testing high-dose NR in "atypical parkinsonian syndromes".
A completed long COVID trial found exploratory signals of improvement in fatigue, sleep, and executive function after 10 weeks of NR, though primary outcomes didn't reach significance (Wu et al., 2025).
Personalization is an emerging theme, as NAD+ response varies significantly between individuals. Most current trials appear to be expecting data by 2028.
Takeaway
NAD+ therapy is grounded in actual biology and makes sense. The decline in cellular NAD+ with age is real, its consequences can be significant, and the science of restoring it is being taken seriously by researchers.
Cautious optimism and continued investigation are appropriate, but not the broad wellness claims currently being made. The next few years of clinical trials will be the real test, so stay tuned.
