NMN vs NAD+: What's the Difference and Which Should You Take?
NMN and NAD+ are often sold side by side, sometimes by the same company and sometimes in the same capsule. That leaves a lot of people unsure whether they're two names for the same thing (they aren't) or rival products (not exactly either). The difference is simple once you see it. It also affects which one you might choose.
Charava is our brand. We make both an NMN and an NAD+ supplement, so we have no reason to talk either one down. We'll tell you where the evidence is stronger and where it's thinner.
The short answer: NAD+ is the coenzyme your cells actually use. NMN (nicotinamide mononucleotide) is a building block that your body converts into NAD+ in one step. NAD+ is a large molecule that doesn't easily cross cell membranes, so most researchers study precursors such as NMN and NR instead. Several placebo-controlled human trials have found that oral NMN raises blood NAD+ levels and is well tolerated. There is much less human research on swallowing NAD+ itself. If you want the option with more published human data, NMN is the usual choice. Higher NAD+ in the blood hasn't yet been shown to translate into proven long-term health benefits.
What NAD+ is
Nicotinamide adenine dinucleotide (NAD+) is a coenzyme found in every cell of the body. It takes part in hundreds of reactions involved in turning food into usable energy. It's also used up by two families of enzymes that have drawn a lot of research interest: the sirtuins and the PARPs, which help regulate metabolism, DNA repair and how cells respond to stress. Because NAD+ is constantly consumed and remade, your cells rely on a steady supply of raw materials to rebuild it.
What NMN is
NMN is one of those raw materials. Your body makes it, and small amounts occur in foods such as broccoli, cabbage, edamame and avocado. Inside the cell, a single enzymatic step turns NMN into NAD+. Nicotinamide riboside (NR) is a close relative, one step further back. Niacin and nicotinamide, both forms of vitamin B3, are older and cheaper precursors.
Why the "just take NAD+" logic doesn't quite work
If NAD+ is what you want, taking NAD+ directly seems obvious. The catch is getting it into cells. As researchers interviewed by AARP explained in 2026, NAD+ is a large molecule that doesn't easily cross cell membranes. That's why most NAD+ supplements actually contain precursors, and why human research on oral NAD+ boosters has focused mostly on precursors such as NMN and NR.
That doesn't prove an NAD+ capsule does nothing. It means the question hasn't been studied well. We couldn't find the kind of placebo-controlled human trials of oral NAD+ that exist for NMN, and we'd rather tell you that plainly.
NMN vs NAD+ vs NR at a glance
| NMN | NAD+ | NR | |
|---|---|---|---|
| What it is | Direct precursor, one step from NAD+ | The active coenzyme itself | Precursor, two steps from NAD+ |
| Getting into cells | Taken up and converted to NAD+ | Large molecule; doesn't easily cross cell membranes | Taken up and converted to NAD+ |
| Placebo-controlled human trials of oral use | Several, mostly 8–12 weeks | Few | Yes, including a 6-week placebo-controlled crossover trial in middle-aged and older adults |
| Doses used in trials | 250–900mg a day | No established oral dose | Varies by trial |
| Main finding so far | Raises blood NAD+; well tolerated | Less studied | Raises blood NAD+; well tolerated |
| US status | FDA confirmed in September 2025 that it can be sold as a dietary supplement | Sold as a dietary supplement | Sold as a dietary supplement |
For a closer look at the two precursors, see our article comparing NR and NMN.
What the NMN trials actually found
| Study | Who | Dose and length | What it found |
|---|---|---|---|
| Irie et al., 2020 (Japan) | 10 healthy men | Single doses of 100, 250 and 500mg | No significant symptoms or changes in heart rate, blood pressure or temperature; NMN was metabolised |
| Okabe et al., 2022 (Japan) | 30 healthy adults, placebo-controlled | 250mg a day for 12 weeks | Blood NAD+ rose significantly; no abnormal test results or obvious side effects |
| Igarashi et al., 2022 (Japan) | Healthy older men, placebo-controlled | 250mg a day for 6 or 12 weeks | Blood NAD+ rose; well tolerated; possible small improvements in walking speed and grip that need confirming; no change in body composition |
| Yi et al., 2023 (multicentre) | 80 healthy middle-aged adults, placebo-controlled | 300, 600 or 900mg a day for 60 days | Blood NAD+ rose in every NMN group, most at 600 and 900mg; well tolerated; six-minute walk distance improved compared with placebo |
Taken together, these trials show that oral NMN reliably raises NAD+ in the blood over weeks and was well tolerated at the doses tested. They were small and short, and several were funded or supplied by NMN manufacturers. A 2025 review in Nature Metabolism struck a cautious note. It found that the evidence for an age-related fall in NAD+ in humans is consistent in only a limited number of studies, and that human trials of NAD+ boosters have so far shown limited effects on health outcomes. Researchers also point out that there's no standard way to measure NAD+ in the body, and that results can differ depending on whether blood or tissue is tested.
In other words, NMN does what it says chemically. Whether that turns into feeling or ageing differently is still being worked out. Anyone who promises more is getting ahead of the science.
Is NMN legal in the US?
Yes. In November 2022 the FDA took the position that NMN couldn't be sold as a dietary supplement because it had been investigated as a drug. In September 2025, responding to a citizen petition from the Natural Products Association and the Alliance for Natural Health USA, the agency reversed that. It concluded that NMN is not excluded from the definition of a dietary supplement, because it was marketed as one in the US before it was authorised for investigation as a drug. That decision applies to the US only. Rules on NMN differ from country to country, so check the position where you live before you buy.
So which should you take?
- Choose NMN if you want the option backed by more published, placebo-controlled human data. This is where most of the trial evidence sits.
- Choose NAD+ if you specifically prefer the coenzyme itself, knowing that oral NAD+ has been studied much less in people.
- Consider a combination if you also want resveratrol, which is often paired with NMN.
- Don't stack several NAD+ boosters at high doses without a reason. More isn't proven to be better.
For dosing and timing, see how much NMN to take and the best time to take NMN. For the coenzyme itself, read what NAD+ is and why it matters.
Charava NMN, NAD+ and NMN+1200
All three are made in the UK, in plant-based capsules, and are vegan and halal, with no artificial colours, flavours or preservatives.
- Charava NMN: 500mg NMN per capsule, over 99.8% pure, and batch tested for heavy metals (arsenic, cadmium, lead and mercury). The serving is 2 capsules a day. US$69.99
- Charava NAD+: 500mg NAD+ per capsule, 1 capsule a day, and batch tested for heavy metals. US$59.99
- Charava NMN+1200: two capsules provide 500mg NMN, 500mg resveratrol and 200mg pterostilbene. US$67.99
Prices are in US dollars, as shown in most countries charava.com delivers to. Orders on charava.com come with a 14-day refund window. See our refund policy for details.
Safety
NMN was well tolerated in the trials above, but those trials were short and in healthy adults. Don't take NMN or NAD+ supplements if you are pregnant or breastfeeding, or if you are under 18. Speak to your doctor or pharmacist first if you take any prescription medicine or have a medical condition. Stop taking it and seek advice if you notice anything unusual after starting.
Frequently asked questions
What is the difference between NMN and NAD+?
NAD+ is the coenzyme your cells use for energy metabolism and repair. NMN is a precursor that your body converts into NAD+ in a single step.
Is NMN better than NAD+?
NMN has more published placebo-controlled human trials showing that it raises blood NAD+ levels. NAD+ is a large molecule that doesn't easily cross cell membranes, and oral NAD+ has been studied far less in people. Neither has yet been shown to deliver proven long-term health benefits.
Does NMN increase NAD+ levels?
Yes, in the blood. Placebo-controlled trials using 250–900mg of NMN a day for 8–12 weeks found significant rises in blood NAD+, and NMN was well tolerated.
Can I take NMN and NAD+ together?
You can, but there's no evidence that combining them works better than NMN alone. If you take regular medication, check with your doctor or pharmacist first.
What about NR?
Nicotinamide riboside (NR) is another NAD+ precursor, one step further back than NMN. Both have human trials showing increases in blood NAD+.
Is NMN legal in the United States?
Yes. In September 2025 the FDA concluded that NMN is not excluded from the definition of a dietary supplement, reversing its 2022 position.
How much NMN is in Charava NMN?
Each capsule contains 500mg of NMN, over 99.8% pure. The serving is 2 capsules a day.
Sources
- Yi L, Maier AB, Tao R, et al. The efficacy and safety of β-nicotinamide mononucleotide (NMN) supplementation in healthy middle-aged adults: a randomized, multicenter, double-blind, placebo-controlled, parallel-group, dose-dependent clinical trial. GeroScience. 2023;45(1):29-43. PubMed 36482258
- Okabe K, Yaku K, Uchida Y, et al. Oral administration of nicotinamide mononucleotide is safe and efficiently increases blood nicotinamide adenine dinucleotide levels in healthy subjects. Front Nutr. 2022;9:868640. PubMed 35479740
- Igarashi M, Nakagawa-Nagahama Y, Miura M, et al. Chronic nicotinamide mononucleotide supplementation elevates blood nicotinamide adenine dinucleotide levels and alters muscle function in healthy older men. NPJ Aging. 2022;8(1):5. PubMed 35927255
- Irie J, Inagaki E, Fujita M, et al. Effect of oral administration of nicotinamide mononucleotide on clinical parameters and nicotinamide metabolite levels in healthy Japanese men. Endocr J. 2020;67(2):153-160. PubMed 31685720
- Vinten, Trętowicz, Coskun, et al. NAD+ precursor supplementation in human ageing: clinical evidence and challenges. Nat Metab. 2025;7:1974-1990. doi.org
- Martens CR, Denman BA, Mazzo MR, et al. Chronic nicotinamide riboside supplementation is well-tolerated and elevates NAD+ in healthy middle-aged and older adults. Nat Commun. 2018;9(1):1286. PubMed 29599478
- AARP. NAD+ supplements: benefits and risks. 2026. aarp.org
- Daniells S. FDA declares NMN lawful in dietary supplements. NutraIngredients. 30 September 2025. nutraingredients.com
Disclaimer:
This article is for general information only and is not a substitute for advice from your doctor or pharmacist. These statements have not been evaluated by the Food and Drug Administration. Charava NMN, NAD+ and NMN+1200 are dietary supplements and are not intended to diagnose, treat, cure or prevent any disease. Do not exceed the recommended daily dose.
