NAD+ Dosage in 2026: How Much to Take, by Form

Here's the short answer. There's no single NAD+ dose, because the right amount depends on how it's delivered. Oral precursors like NMN or NR are usually taken at 250 to 500 mg a day. IV drips in clinics run roughly 250 to 750 mg per session. Subcutaneous injections tend to fall around 50 to 200 mg per dose, two to three times a week.

Nasal sprays are lower, often around 25 to 30 mg per spray. Most clinicians start low, ramp up over a few weeks, and dose in the morning. Below we break down each form, the timing and side effects, and what the research shows. Your exact dose should come from your prescriber and your pharmacy label, not a range on a page.

How much NAD+ should you take per day?

There isn't one NAD+ dose. The amount depends entirely on the form, because each route reaches your bloodstream differently. Swallowing a pill, running an IV, injecting under the skin, and spraying into the nose all deliver very different amounts of usable NAD+. That's why a 500 mg oral capsule and a 50 mg injection can both be reasonable. They aren't measuring the same thing.

Note that oral products are usually NMN or NR, which are precursors your body converts toward NAD+, not NAD+ itself. Injections, IV, and nasal sprays can deliver NAD+ directly. We cover that difference below. The pattern almost everyone follows is the same: start at the low end, ramp up slowly, and let your body set the pace.

How NAD+ dosage differs by delivery method

Delivery is the whole story with NAD+, so here's each route in plain terms.

• Oral precursors (NMN, NR): usually 250 to 500 mg daily, sometimes higher. Studies have tested up to 900 mg of NMN as safe and well-tolerated in healthy adults. Because NAD+ itself is a large molecule that the gut handles poorly, oral products use precursors that the body converts toward NAD+, which is why oral numbers run higher than injected ones.
• IV drip: roughly 250 to 750 mg per session in wellness clinics, sometimes up to about 1,000 mg short-term. It's an effective way to get NAD+ into the blood, but it's slow (often 1 to 3 hours), expensive, and requires an in-person appointment each time.
• Subcutaneous injection: about 50 to 200 mg per dose, two to three times a week. A small shot under the skin at home. It skips the gut, so lower numbers go further than an oral dose, and it doesn't need a clinic chair.
• Nasal spray: around 25 to 30 mg per spray, usually once daily. The lowest numbers on the chart, and the most convenient. Useful for people who don't want needles.

NMN and NR are precursors, not NAD+ itself

This trips people up, so it's worth being exact. Nicotinamide mononucleotide (NMN) and nicotinamide riboside (NR) are precursors. Your body takes them in and converts them a step or two toward NAD+. They aren't NAD+, and they're the reason oral dose numbers run higher: the body converts them a step or two before they act as NAD+, so more goes in to reach the same place.

NAD+ (nicotinamide adenine dinucleotide) is the coenzyme itself. It's the fuel your cells use for DNA-repair enzymes and the sirtuin longevity pathways, and its levels fall as you age. Injections, IV, and nasal sprays can deliver NAD+ directly rather than relying on your body to build it from a precursor. Neither approach is automatically better for everyone, but they're not interchangeable, and the dose numbers reflect that.

If you're weighing the two paths, the short version is: precursors are convenient and oral, direct NAD+ skips the conversion step. Neither is a default winner, and your prescriber can help you land on the one that fits your history and goals.

Dose in the morning and ramp up slowly

Two habits show up in almost every protocol: dose in the morning, and start low. NAD+ can feel activating, so a morning dose keeps that from interfering with sleep. Starting at the low end of the range and increasing gradually over two to three weeks lets your body adjust and helps you find the amount that works without side effects.

1. Start at the low end of your prescribed range.
2. Dose in the morning, not close to bedtime.
3. Ramp up gradually over a few weeks if you tolerate it well.
4. For injections, you can split a dose to soften side effects.
5. Give it time. Effects are cumulative, so plan on roughly 8 to 12 weeks before judging.

What to expect: flushing, pressure, and short-lived nausea

The most talked-about NAD+ side effects come with fast delivery, and they're usually temporary. During and shortly after a dose (often the first 15 to 45 minutes) people report flushing, a feeling of pressure in the head or chest, and transient nausea. With IV drips, these are tied largely to infusion speed. Slowing the drip, or with injections splitting or lowering the dose, tends to ease them.

• Common and short-lived: flushing, head or chest pressure, mild nausea during or just after a dose.
• With injections: injection-site tenderness or redness.
• Ways to reduce it: go slower, split the dose, and don't jump to a high amount too fast.
• Talk to a clinician first if you're pregnant or breastfeeding, or have significant heart, liver, or kidney conditions.

One safety point people ask about: NAD+ is not a controlled substance, and it is not on the WADA prohibited list. That said, effects and tolerability vary, which is exactly why a prescriber and a titration plan matter.

What the evidence shows

Trials show NAD+ levels can be raised safely, and that raising them is studied for supporting the systems that lean on NAD+ as we age.

• NAD+ is studied for endurance and metabolic support, and that research is strongest in older adults, whose NAD+ levels have naturally declined.
• NAD+ acts as fuel for DNA-repair enzymes and sirtuins, so it supports the cellular repair pathways it is studied for. It is not a treatment for any disease.

The takeaway: NAD+ can be raised safely, and it is studied for supporting energy, endurance, and metabolic health, most of all in adults whose levels have naturally declined with age.

Loading phase vs. maintenance: how a NAD+ routine usually ramps

Most NAD+ protocols run in two phases. A shorter loading phase uses more frequent doses to raise your levels, then a maintenance phase settles into a lower, steadier cadence to hold them there. The exact schedule depends on your delivery route, your baseline, and how you respond, so it should come from your prescriber rather than a fixed rule.

With pru, NAD+ is a prescribed, 503A-compounded, at-home injection (a nasal option is also available), so your loading and maintenance cadence is written into your plan by a licensed physician and can be adjusted at follow-up. See how NAD+ works with pru.

NAD+ side effects and safety: what the research shows

In published human trials, oral NAD+ precursors have generally been well tolerated. Studies of NMN at doses from 250 mg up to about 1,250 mg per day, running 4 to 12 weeks, reported no serious adverse events. The side effects that did appear were mild and uncommon: occasional GI discomfort, headache, flushing, and rare trouble sleeping.

• Oral NMN/NR: mild and infrequent effects, most often mild GI upset or headache; flushing is less common with NMN than with plain niacin
• Injectable and IV NAD+: temporary flushing, nausea, or discomfort at the injection or infusion site, usually dose- and rate-dependent
• Faster infusions tend to bring on more flushing or nausea, which is why clinic IV drips are given slowly

Who should not take NAD+, and what to tell your physician

NAD+ is not right for everyone, and a few situations call for extra caution. Because a licensed physician reviews your history before prescribing, this is exactly what the intake and visit are for. Flag these before starting:

• Pregnancy or breastfeeding, where NAD+ has not been well studied
• Liver or kidney conditions
• Heart conditions, or if flushing and blood-pressure changes are a concern
• Any current medications, including niacin or other B3 forms, blood-pressure medication, and immune-modulating drugs, so your prescriber can check for interactions

Share your full medication list at intake so your plan fits your history, and if NAD+ isn't a fit, your prescriber will say so. You can review membership and how visits work.

How to tell if your NAD+ dose is working

There is no single right number. The goal is the lowest effective dose that gives a steady response without side effects, and it is normal to adjust over the first several weeks. Your physician can also retest blood NAD+ levels to guide changes rather than going on feel alone.

• Signs the dose may be about right: steadier day-to-day energy and no bothersome side effects
• Signs it may be too low: little change after a full loading period, or effects that fade within hours
• Signs it may be too high: flushing, nausea, or feeling wiped out after a dose

If anything feels off, the answer is a conversation with your prescriber, not a bigger dose on your own. With pru, dose adjustments happen at follow-up and are handled by the physician who wrote your plan.

How pru handles NAD+ dosing

Here's the model in one line: you choose the peptide you want to start, guided by pru, and a licensed physician confirms it is appropriate for you or advises against it. From there, pru dispenses NAD+ as a prescribed, 503A-compounded medicine you take at home, either a subcutaneous injection or a nasal spray. The physician sets your dose and titration plan, and the pharmacy label carries the exact instructions. That's the difference from the three common alternatives, and it's worth being clear about each.

A note on quality: pru's compounded NAD+ is pharmacy-grade, prepared by a state-licensed, FDA-registered 503A compounding pharmacy as an individualized prescription. We don't call it FDA-approved, because compounded medicines aren't. What you get instead is a clinician, a real label, and known sourcing, which is exactly what the research-grade vials don't offer.

On price, pru is a flat membership of about $50 a month that funds the platform, and every therapy is priced at cost and itemized. You pay for the medicine, not a markup on it.

Getting ahead of how you age is a smart, responsible thing to do, and pru exists to make that proactive choice the accessible one: licensed physicians, pharmacy-grade medicine, and at-cost pricing on the same path. If you want to see how a prescribed at-home dose would work for you, start with NAD+ or browse cellular health when you are ready.

Related reading

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• NAD+ benefits
• NAD+ injection vs IV vs oral
• see it on pru

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