Does NAD+ IV Therapy Work? What the Evidence Says

NAD+ drips are now on the menu at many Bangkok IV clinics, longevity centres and some hotel wellness services. The marketing usually promises more energy, sharper thinking and slower ageing. The claimed NAD+ IV benefits rest on a real and interesting area of biology, but the human evidence for the drip itself is much thinner than the brochures suggest.

This guide sets out what NAD+ does, what the small number of human IV studies actually measured, how drips compare with oral supplements, and who should be cautious. For a broader view of drips available in the city, see our IV therapy overview.

What NAD+ does in the body

Nicotinamide adenine dinucleotide (NAD+) is a molecule found in every living cell. It plays a central role in turning food into usable energy and acts as a necessary partner for enzymes involved in repairing DNA and regulating how cells respond to stress, including the sirtuin and PARP enzyme families.

Your body makes NAD+ from building blocks in food, including forms of vitamin B3 (niacin and nicotinamide) and the amino acid tryptophan. It also recycles NAD+ constantly through a "salvage" pathway.

The ageing link comes mainly from laboratory and animal research. Studies in animals and cells have found NAD+ levels decline with age in some tissues, and that raising them can improve markers of metabolic and mitochondrial function in those models. That is a reasonable basis for research. It is not the same as evidence that a drip makes people healthier or slows human ageing.

Human evidence for IV NAD+

There are very few published human studies of intravenous NAD+, and those that exist are small, short and largely focused on what happens to the molecule rather than on health outcomes.

What happens to infused NAD+

A 2019 pilot study in Frontiers in Aging Neuroscience gave eight healthy men aged 30–55 a 750 mg NAD+ infusion over six hours, with three men receiving saline as a comparison. For the first two hours, the researchers saw no rise in blood NAD+ or its breakdown products, suggesting the infused molecule was being cleared or broken down quickly. Blood levels did rise substantially by the end of the six-hour infusion, and NAD+ also appeared in the urine.

The study was not designed to test energy, cognition or ageing, and it did not measure NAD+ inside cells. Several authors had commercial ties to NAD+ infusion, which the paper disclosed.

Tolerability in a clinic setting

A 2026 retrospective study in Frontiers in Aging reviewed records from a commercial wellness clinic. Six people received 500 mg of IV NAD+ daily for four days, and eight received IV nicotinamide riboside (NR), a precursor. All six NAD+ recipients reported moderate to severe symptoms during the infusion, including nausea, cramping, a faster heart rate and chest pressure, which settled once the drip stopped. NAD+ infusions took considerably longer, as people slowed the drip to cope.

The authors found no clinically significant changes in routine blood safety markers over 30 days, but the study was tiny, had no placebo group, could not detect changes in blood NAD+ reliably, and was funded and conducted by the clinic operator. They described the findings as preliminary.

What is missing

As of October 2026, we found no large, randomised, placebo-controlled trial showing that IV NAD+ improves energy, cognitive performance, physical function, biological age or lifespan in healthy adults. If a clinic tells you otherwise, ask for the specific study and check its size, design and funding.

IV vs oral NMN and NR

Oral NAD+ precursors, mainly nicotinamide riboside (NR) and nicotinamide mononucleotide (NMN), have been studied more extensively than drips. A 2023 review in The Journals of Gerontology found that these supplements raise NAD+ and related compounds in blood and some tissues, and were generally safe and tolerated in the trials reviewed.

However, the same review concluded that whether raising NAD+ improves physiological function in humans remains unclear. Trials have used different doses and durations, and many were small.

So on the question of NAD+ vs NMN, neither has strong evidence for the benefits most often marketed. IV delivery is faster at raising blood levels, but faster is not the same as better, and it brings its own discomfort, cost and needle-related risks. Supplement quality is a separate concern: products are not regulated like medicines, so content can vary.

We do not give dosing advice for drips or supplements. If you are considering either, discuss it with a doctor who knows your medical history and medications.

NAD+ claims to treat with caution

Be sceptical of any of the following:

• "Reverses ageing" or "lowers your biological age." Biological-age tests are themselves imperfect, and no robust trial shows NAD+ reliably changes them. Our guide to biological age testing explains the limits of these scores.
• "Detoxes" or "repairs" your cells. These are marketing phrases, not measured outcomes.
• Treating addiction, depression, chronic fatigue or neurological disease. These are medical conditions that need proper assessment and evidence-based care. Some clinics cite small or uncontrolled reports. Do not use a drip in place of treatment.
• "You will feel it immediately." Many people do feel something during an NAD+ drip, but that is often the discomfort described above, not evidence of benefit.
• Course discounts. A 10-session package is a sales structure, not a dose determined by evidence.

For a wider look at which longevity interventions have stronger and weaker support, see our guide to longevity treatments and the evidence behind them.

Who should not try NAD+ IV, or should check first

Because human data are so limited, the safest stance is caution. Speak to a doctor before any NAD+ drip, and avoid it unless specifically cleared, if you:

• Are pregnant or breastfeeding (there are no safety data)
• Have heart disease, arrhythmia, or have had chest pain
• Have kidney or liver disease
• Have a current or past cancer, as the effect of boosting NAD+ on tumours is not well understood, so discuss it with your oncologist
• Take regular medication, particularly for blood pressure, diabetes or mental health
• Have had a reaction to an infusion before, or have veins that are hard to access

A responsible clinic will take a medical history, check your blood pressure, explain likely side effects, keep the drip slow, and stop it if you feel chest pressure, breathlessness or severe nausea.

Seek urgent care if you develop chest pain, difficulty breathing, swelling of the face or throat, fainting, or redness and swelling spreading from the drip site.

If after all this you still want to try a drip, our guide to NAD+ IV prices in Bangkok explains how to compare quotes by dose rather than package price.

Frequently asked questions

How quickly do people "feel" NAD+?

Many people notice sensations during the drip itself, such as nausea, flushing, cramping or chest tightness, which usually ease when the infusion is slowed or stopped. Reports of extra energy or clarity afterwards are anecdotal. Without placebo-controlled studies, it is hard to separate a real effect from expectation.

Is NAD+ safe long term?

Nobody knows yet. The published IV studies followed people for hours or weeks, not years. Oral precursor trials have looked reassuring over months, but long-term safety data, particularly for repeated IV courses, are lacking.

Is IV NAD+ better than taking NMN?

There is no good evidence that either delivers the health benefits marketed. IV raises blood levels faster but is more expensive, takes longer and causes more side effects during infusion. Discuss any supplement with a doctor before starting.

Can NAD+ help with jet lag or hangovers?

There is no good evidence for either. For hydration after a long flight or a heavy night, oral fluids are usually enough, and persistent symptoms deserve a medical check.

Related guides

• IV therapy in Bangkok: overview
• NAD+ IV prices in Bangkok
• Longevity treatments: which claims have evidence
• Biological age testing explained

This guide is general information, not medical advice. Prices and services change; confirm details directly with the provider. See our editorial methodology and medical disclaimer.

Sources (checked October 2026)

• Grant et al. (2019), pilot study of plasma and urine NAD+ metabolites during a 6-hour IV NAD+ infusion — Frontiers in Aging Neuroscience
• Reyna et al. (2026), Intravenous infusion of NAD+ versus nicotinamide riboside: a retrospective tolerability pilot study — Frontiers in Aging
• Freeberg et al. (2023), Dietary supplementation with NAD+-boosting compounds in humans — The Journals of Gerontology, Series A (University of Delaware repository)