Here's the short version. You buy NMN the way you'd buy fish oil: from supplement brands, online stores and some shops, no prescription. FDA reversed its ingredient-level exclusion in September 2025; that does not approve every NMN product. The catch is that no one approves the bottle first, so checking it is on you.
Where NMN is sold in the US
NMN is sold as a dietary supplement by online retailers, supplement brands and some stores, with no prescription.
It comes as capsules, tablets and powders you swallow. That's the only kind of product the supplement rules cover. FDA says supplements "must be swallowed," so topical or inhaled products don't count [3]. This page names no brands. The checklist below works on any of them.
NMN is not categorically excluded from supplements
Yes. On September 29, 2025, FDA concluded that NMN isn't excluded from the dietary-supplement definition, reversing its 2022 position.
| Date | What happened |
|---|---|
| October 11, 2022 | FDA tells a company that filed an NMN ingredient notice that NMN is excluded from the supplement definition, and sends similar letters to every NMN filer [1] |
| March 7, 2023 | Two trade groups, the Natural Products Association and the Alliance for Natural Health USA, petition FDA to reverse course [1] |
| 2023 | The Council for Responsible Nutrition files its own NMN petition [2] |
| September 29, 2025 | FDA answers both petitions: NMN is not excluded under the drug-investigation provision; product-specific requirements still apply [1] [2] |
The reason for the reversal was narrow. FDA had first said NMN didn't count because drug research on it came before supplement sales. It then accepted evidence that NMN was sold as a supplement in the US "as early as 2017." That came before the drug research began, so FDA changed how it reads the rule [1]. If you want to know where NMN stands outside the US, see is NMN legit?
What FDA does and doesn't check
FDA doesn't approve dietary supplements or test them before they're sold. Makers are responsible for safety and truthful labels.
In FDA's words, it "does not have the authority to approve dietary supplements before they are marketed" [3]. Where a new dietary ingredient notification is required, it must be filed before marketing. FDA's letter makes clear that accepting a notice "does not constitute a finding by FDA" that the ingredient or product is safe [1].
Label claims are limited too. A supplement can describe how it affects the body. It must also carry FDA's disclaimer that it isn't meant to "diagnose, treat, cure, or prevent any disease." Only a drug can legally make those claims [3]. So if an NMN bottle says "FDA-approved," that's wrong.
How to tell a genuine NMN product
Look for a named manufacturer, an amount per serving, outside third-party testing and a batch certificate of analysis you can read.
| Check | What to look for | Why it matters |
|---|---|---|
| Manufacturer | A named company with a US address | Someone is accountable for the product |
| Amount | Milligrams of NMN per serving on the label | Trials report what they gave, so you can compare |
| Testing | A third-party lab result or seal | FDA doesn't test supplements before sale |
| Certificate of analysis | A batch certificate you can read, matched to your lot | Shows purity and contaminant results for that batch |
| Claims | No "treats," "cures" or "FDA-approved" language | Supplements can't legally claim to treat disease |
| Form | Capsules, tablets or powder you swallow | Injectable or "research use only" NMN isn't a supplement |
- Red flag: disease-treatment claims, like "reverses diabetes."
- Red flag: "pharmaceutical grade" with no lab result behind it.
- Red flag: injectable NMN, or a vial labeled "research use only."
The amount per serving is for comparing products, not a dosing guide. Follow the product's directions and ask your clinician, especially if you take other medicines.
Can you get NMN from food? Only in tiny amounts
Some vegetables and fruits contain NMN, but in tiny amounts compared with supplements.
One lab study measured NMN in everyday foods. Edamame had up to 1.88 mg per 100 grams, broccoli up to 1.12 mg and avocado up to 1.60 mg. Raw beef had less, up to 0.42 mg [4]. One 12-week trial in older adults gave 250 mg a day [6]. Even at the top edamame figure, matching that would take more than 29 pounds (13 kilograms) of edamame a day. Food is a fine part of eating well. It just isn't a practical way to get trial-level NMN.
NMN vs prescription NAD+: different routes
If you want NAD+ itself, injectable and nasal forms are prescribed through telehealth programs and made by compounding pharmacies.
That route starts with a clinician visit, not a shopping cart. See where to get NAD+ injections and what NAD+ injections cost, or read up on what NAD+ is. The two aren't interchangeable. For how they connect, see NMN and NAD+ together.
What the evidence shows, briefly
In small trials, NMN reliably raised blood NAD levels, but benefits people could feel were inconsistent [5] [6].
That's worth knowing before you spend. Read does NMN work? and is NMN safe? first. If you've already tried it and felt nothing, why people stop taking NMN explains what the trials found. If energy is what you're after, our energy shortlist is the place to start.