NAD+ Injections vs NAD+ IV Therapy: Time, Cost and Comfort Compared

For ongoing, clinician-guided NAD+ support, our clinicians start with the at-home injection. A subcutaneous dose takes minutes, it is priced flat at Arbor from $99 a month, and it comes with a care team you can message between doses. The most common effects are mild redness or soreness where the needle went in.

IV therapy is built for one thing: the largest single dose in one sitting, with a nurse beside you. The trade is time and comfort. In a 2026 clinic study, 500 mg infusions averaged 97 minutes because people slowed the drip when nausea or chest pressure set in, and the 2019 pilot study ran 750 mg over six hours.

Neither form is FDA-approved. Both are compounded, and both belong under a clinician who has reviewed your history.

NAD+ (nicotinamide adenine dinucleotide) is a coenzyme your cells use to turn food into usable energy and to run maintenance processes such as DNA repair. Levels are generally described as declining with age, which is the rationale for supplementing it. Arbor's NAD+ explainer covers the molecule itself. This article is only about the two ways a prescribed dose reaches your bloodstream. Both bypass the digestive tract entirely; the difference is what happens after the needle.

IV therapy: into a vein, over hours

In an infusion, NAD+ powder is reconstituted and diluted into a bag of saline, a nurse places a catheter in a vein in your arm, and the solution drips in. Nothing has to be absorbed, so the entire dose enters circulation at whatever rate the drip is set to. In the 2026 clinic study, 500 mg was diluted in 500 mL of saline and clients controlled their own flow rate based on how they felt. It was a retrospective review of six NAD+ clients, and the paper discloses that the researchers were employed by the commercial infusion company whose records they reviewed (Reyna and colleagues, 2026).

Injections: into the fat under the skin, in minutes

A subcutaneous injection places a small volume into the fatty layer of the abdomen or thigh with a short, fine needle. From there it diffuses into the bloodstream over time rather than all at once. Some clinics give NAD+ into muscle instead; Arbor's program uses the subcutaneous route. At Arbor the medication ships to your door and is self-administered on a schedule your clinician sets. We do not publish a dose; the clinician sets it from your history.

What the studies actually show

The human data on either route is small. The most cited pharmacokinetic study infused 750 mg over six hours into eight healthy men aged 30 to 55. Plasma NAD+ did not rise for the first two hours, which the authors read as the body clearing it from the blood as fast as it arrived, and no adverse events were observed. The study was funded in part by an NAD+ research company and conducted at a wellness center that offers IV NAD+, as the authors disclose (Grant and colleagues, 2019).

A 2026 systematic review of 113 studies found no eligible outcome trials of intravenous or intramuscular NAD+ for anti-aging or wellness at all. Oral precursors such as nicotinamide riboside reliably raised blood NAD+ and were well tolerated, but their effects on how people actually function were mixed or null (Gallagher and Emmanuel, 2026). For subcutaneous NAD+ specifically, we could not find a published human trial. That is the honest baseline for both routes: biological activity is clear, clinical benefit is not established, and individual responses vary. A program supports your levels under clinician guidance rather than promising a specific result.

Time is the clearest difference between the two routes, and it is not close.

An IV session is measured in hours. The pilot study ran its infusion over six hours, at about 2 mg per minute. In the clinic study, where clients set their own drip speed, the 500 mg NAD+ infusions averaged 97 minutes, and the authors attribute the length to moderate to severe symptoms. That protocol was four infusions on four consecutive days, which the authors describe as the typical commercial loading schedule. With travel and check-in, each dose takes most of a morning or an afternoon.

An injection is measured in minutes. You take it at home, at a time that suits you, on a cadence your clinician sets, and you message your care team if anything feels off. Over a month of ongoing support, the difference between the two routes is the difference between a standing appointment and a routine.

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The discomfort reported with IV NAD+ tracks how fast it enters the blood, which is why the drip gets slowed.

In the clinic study, all six people receiving NAD+ IV reported moderate to severe gastrointestinal symptoms, a faster heart rate and chest pressure during the infusion. All of it resolved once the infusion ended, and slowing the drip was how it was managed. The authors suggest these effects may relate to pushing NAD+ outside the cells to far above normal levels, and they note that the slow, prolonged infusions clinics use to limit discomfort have not been formally studied (Reyna and colleagues, 2026).

Any IV line also carries small risks a shot does not, chiefly irritation of the vein (phlebitis) and fluid leaking into the tissue around the catheter (Abolfotouh and colleagues, 2014).

What injections feel like

With a subcutaneous shot, the most common effects are mild redness or soreness at the injection site. Some people notice temporary nausea, headache or fatigue as their body adjusts, as our NAD+ explainer notes. The dose is small and absorbs gradually from the tissue under the skin, so there is no drip to slow and no chair to sit in while it goes in.

At Arbor, NAD+ injections start from $99 a month, flat, with the physician review, the medication, free shipping, clinician check-ins and 24/7 support inside that price. It is HSA and FSA eligible, there is no membership fee, and you can cancel anytime. If the physician decides it is not appropriate for you, you are not charged.

IV NAD+ is priced per session, and the session is what you are paying for. Nursing time, a catheter, saline and hours of chair time sit inside the price, and a loading series multiplies it. Prices vary by clinic, so ask for the all-in cost of the full series, not the single-session number.

FDA status and pharmacy quality

Both routes use compounded NAD+. FDA has not approved any NAD+ drug product, so injectable and IV NAD+ in the United States is compounded, and FDA does not verify the safety, effectiveness or quality of compounded drugs before they are marketed (FDA compounding Q&A). In a September 2019 proposed rule, FDA proposed not placing NAD on the 503A bulks list for the use it had been nominated for, fatigue in multiple sclerosis (Federal Register, September 5, 2019). As of its May 14, 2026 update, FDA lists NAD in 503A Category 1, bulk drug substances under evaluation (FDA 503A categories).

Quality therefore depends on the pharmacy. In October 2024 FDA warned that some compounders had used food-grade NAD+ to make intravenous products, and that it had received reports of severe chills, shaking, vomiting and fatigue after NAD+ injectables, reactions consistent with excessive endotoxin levels (FDA, 2024). Arbor's NAD+ is compounded by licensed 503A and 503B U.S. pharmacies and dispensed only after a board-certified physician reviews your intake. Whichever route you choose, ask which licensed pharmacy prepares your NAD+.

For adults who want ongoing NAD+ support, our clinicians start with the at-home injection. It fits an ordinary week, it is priced flat, and a care team stays with you between doses. No trial has compared the two routes head to head, so the choice rests on practical fit and your history.

Start with NAD+ injections when

• You want ongoing, clinician-guided NAD+ support that fits around work and family rather than around a clinic's calendar
• You want a physician to review your history first, then a care team you can message at any hour
• Chair time or per-session pricing is the reason you have not started
• You are comfortable with a small at-home injection and with the fact that it is a compounded medication

IV therapy might suit you when

• You specifically want a larger single dose under direct nursing observation, and you accept the hours and the price that come with it
• Injecting yourself at home is not something you are willing to do, and a seated infusion in a clinic is

Either way, a physician should review your full health history first, including pregnancy plans, cancer history and every medication and supplement you take. At Arbor, if it is not the right fit, it is not prescribed. The 90-second eligibility quiz is where that review starts.