NAD+ Injections: Benefits, Risks and Cost

Search "NAD+ injections" and you will find two kinds of page: clinics selling infusions, and supplement brands waving them away. Neither tends to cite the pharmacokinetics. This guide does.

NAD+ injections are real, they are widely sold, and they do measurably raise NAD+ in the blood. They are also expensive, not FDA approved, associated with a meaningful side effect profile in the one tolerability study that measured it, and unsupported by controlled outcome trials for the anti-aging claims made about them. All of that is true at the same time.

What are NAD+ injections?

NAD+ injections deliver nicotinamide adenine dinucleotide directly into the bloodstream, skipping the digestive tract. They come in two forms:

• Intravenous (IV) infusion. A drip lasting anywhere from 45 minutes to several hours, usually delivering 250 mg to 1,000 mg per session at a wellness clinic or med spa.
• Subcutaneous or intramuscular injection. A smaller shot, sometimes prescribed for at-home use, typically 50 mg to 100 mg.

The rationale is straightforward. The NAD+ molecule is large and unstable, and oral NAD+ is largely broken down before absorption. Injecting it appears to solve that problem by putting the molecule where you want it. Whether it stays there is a different question, and it is the one the research actually answers.

What the published evidence actually shows

The controlled-trial gap

This is the finding that matters most, and it is the one clinic pages omit. A 2024 systematic review in the American Journal of Physiology, Endocrinology and Metabolism assessed the safety and effectiveness of NAD across clinical conditions. It found no eligible controlled outcome trials of intravenous, intramuscular or subcutaneous NAD+ for anti-aging or wellness outcomes.^[3]

Not trials with disappointing results. No eligible trials. The energy, focus, recovery and longevity claims attached to NAD+ infusions rest on mechanism and anecdote, not on controlled human outcome data.

What the pharmacokinetics found

The most informative human study on injected NAD+ is a 2019 pilot published in Frontiers in Aging Neuroscience. Eight subjects received 750 mg of NAD+ intravenously over six hours, at roughly 2 mg per minute.^[1]

The result was not what the marketing implies. For the first two hours, researchers observed no change in plasma NAD+ or its metabolites, despite continuous delivery. The authors concluded that at that infusion rate, NAD+ is rapidly and completely removed from the plasma for at least the first two hours.

By hour six, plasma NAD+ had risen roughly 398% above baseline. Urinary NAD+ excretion had risen roughly 538%. A substantial share of what was infused left the body in urine.

Two honest readings follow. The optimistic one: NAD+ disappearing from plasma may mean rapid cellular uptake, which is the point. The cautious one: a large fraction is being excreted, and plasma levels only climb once the clearance pathways saturate. The study cannot distinguish between them, and neither can anyone selling you a drip.

Side effects: what the one tolerability study reported

In 2026, Frontiers in Aging published a retrospective pilot comparing NAD+ IV against nicotinamide riboside (NR) IV in a real-world clinic setting. Participants received 500 mg of one or the other, intravenously, on four consecutive days.^[2]

All six participants in the NAD+ group reported adverse experiences. The reported effects were moderate to severe abdominal cramping, diarrhea, nausea, vomiting, raised heart rate, throat pain and chest pressure during infusion. Symptoms resolved as soon as the infusion finished.

The infusion time tells the same story from another angle. NAD+ infusions averaged 97 minutes. NR infusions averaged 37 minutes. The difference was statistically significant and driven by having to slow the NAD+ drip down to keep the adverse effects tolerable.

This is a small retrospective study, and it should be read as such. But it is the study that exists, and its finding is that the discomfort commonly described as "part of the process" was universal at this dose.

Safety and regulation: the part most pages skip

There is no FDA-approved commercial NAD+ injectable. Every NAD+ injection sold in the United States is a compounded product, prepared by a compounding pharmacy under a different regulatory standard than manufactured drugs.

That distinction became concrete in 2025. The FDA classified a recall of NAD+ for Injection, manufactured by GenoGenix LLC of Boca Raton, Florida, as Class I, the agency's most serious category, reserved for products that may cause serious harm or death. The cause was elevated endotoxin levels. Three patients had already developed low blood pressure, uncontrollable shaking, shivering and body aches after receiving product drawn from the same vial.

The FDA has separately warned that some compounders have used food-grade NAD+, intended for oral supplements, to prepare sterile injections.

None of this means every clinic is unsafe. It means the quality floor is set by your specific compounding pharmacy rather than by a manufacturing standard, and that is a materially different risk profile from a capsule.

What NAD+ injections cost

Item	Typical US cost
Single IV session	$250 to $2,000, most commonly $300 to $800
Single session in NYC, LA or Chicago	$600 to $1,000+
Add-ons (glutathione, vitamin C, B-complex)	$25 to $50 each
Loading phase plus maintenance, per year	$8,000 to $18,000
Insurance coverage	None. Not FDA approved for any condition

NAD+ injections versus oral NMN

The fair comparison is not injections against oral NAD+, which absorbs poorly. It is injections against an oral precursor such as NMN, which your body converts to NAD+ in a single enzymatic step. We cover that conversion in detail in NMN vs NAD+.

	NAD+ injection / IV	Oral NMN
Cost per month	$600 to $3,000	$40 to $90
Clinic visit required	Yes, 45 min to 6 hrs	No
Raises blood NAD+	Yes, ~398% at 6 hrs[1]	Yes, significant at 300 to 900 mg/day[5]
Randomized controlled outcome trials	None identified[3]	10 RCTs, 437 participants[4]
Reported adverse effects	6 of 6 participants, moderate to severe[2]	8.2% of participants, none serious[4]
Functional outcome evidence	None identified	Six-minute walking distance improved[5]; muscle insulin sensitivity +25%[6]
FDA status	No approved formulation, compounded only	Lawful dietary supplement ingredient

The pattern is consistent. Injections win on delivery mechanics. Oral precursors win on evidence, cost, safety record and convenience. If your goal is raising NAD+ with the best-supported route, the oral evidence base is the one with randomized trials behind it.

Who might still reasonably consider injections

There are situations where the calculus changes:

• Documented malabsorption. If a diagnosed gastrointestinal condition genuinely impairs oral absorption, bypassing the gut has a real rationale. This is a conversation with a physician, not a med spa.
• Clinical trial participation. If injected NAD+ is being studied for a specific condition and you qualify, that is a legitimate route into the evidence base.
• You have tried consistent oral supplementation and want to escalate. Reasonable, provided you go in knowing the cost, the side effect profile and the absence of outcome trials.

What does not hold up is the default framing: that injections are simply the stronger version of the same thing. On current published evidence, they are the more expensive and less studied version.

The bottom line

NAD+ injections deliver NAD+ into the blood. That much is measured. Everything past that point, the energy, the clarity, the slowed aging, is currently supported by mechanism and testimonial rather than by controlled trials, while the tolerability data that does exist is not flattering and the regulatory footing is a compounding pharmacy rather than a manufacturer.

If you want to raise NAD+ with the strongest published support behind it, the oral precursor route is where the randomized trials are. Start with NAD+ supplements for the wider picture, or go straight to NMN supplements and how much NMN to take per day.

Where Nadosei fits: Nadosei NAD+ Booster pairs 500 mg of beta-NMN with TMG, resveratrol, quercetin and green tea extract, at roughly the cost of a single add-on to one infusion session. It targets the same pathway the injections aim at, by the route the clinical trials actually studied.

These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease. Speak to your physician before starting any supplement or infusion protocol, particularly if you are pregnant, breastfeeding, or managing a medical condition.