Comparing two NMN labels side by side: dose, price per 250 mg and quality documents.
Nutricost NMN vs GenuinePurity NMN: 7 Honest Label Facts
Answer first: in the Nutricost NMN vs GenuinePurity NMN comparison, Nutricost costs far less per 250 mg, while GenuinePurity shows more quality paperwork on its page. Both list 250 mg per capsule. Human trials used 250 mg a day, so a bigger dose is no proof of a better bottle. GenuinePurity NMN is the option for buyers who want documents.
Affiliate disclosure: links to GenuinePurity on this page are affiliate links (code 618161). We may earn a commission at no extra cost to you. We earn nothing from Nutricost, and we compare both brands by the same checklist. This page is educational and does not diagnose, treat, cure or prevent any disease.
Table of Contents
People search Nutricost NMN vs GenuinePurity NMN because the two bottles look alike on paper and sit far apart on price. One is a budget brand sold in many stores. The other is a specialist brand with a higher price. Which one deserves your money?
This Nutricost NMN vs GenuinePurity NMN guide reads both official pages dated October 19, 2026, then checks what human studies actually tested. Prices and terms change, so confirm them on the brand pages. We do not claim either product is better than the other for your body.
Nutricost NMN vs GenuinePurity NMN Fact 1: the capsule strength is the same
The Nutricost page lists 500 mg of NMN per serving, with 2 capsules per serving and 60 capsules per bottle. That works out to 250 mg per capsule. GenuinePurity lists 250 mg per capsule, 96% NMN, 60 capsules, and says to take 1 capsule daily with meals.
So the Nutricost NMN vs GenuinePurity NMN dose gap is about the suggested serving, not the capsule. Taking 2 Nutricost capsules gives 500 mg. Taking 1 GenuinePurity capsule gives 250 mg. You could take 1 capsule of either and get the same listed NMN.
| Label detail (brand pages, 2026-10-19) | Nutricost NMN | GenuinePurity NMN |
|---|---|---|
| NMN per serving | 500 mg (2 capsules) | 250 mg (1 capsule) |
| NMN per capsule | 250 mg (calculated) | 250 mg |
| Capsules per bottle | 60 | 60 |
| Purity stated | Not found in the page text we read | 96% NMN |
| Other ingredients | Not listed in the text we read | Vegetable cellulose, phospholipid complex (sunflower lecithin), microcrystalline cellulose, silicon dioxide, vegetable stearate |
Nutricost NMN vs GenuinePurity NMN Fact 2: price per 250 mg decides the budget question
Nutricost lists $21.97 for one bottle. GenuinePurity lists $69 for one bottle, $65 each for three, $59 each for six, and $49 per bottle on a 30-day subscription. We divided each price by 60 capsules to compare the same 250 mg.
| Option (listed price) | Cost per 250 mg capsule | Cost for a 500 mg day |
|---|---|---|
| Nutricost, 1 bottle, $21.97 | about $0.37 | about $0.73 |
| GenuinePurity, 1 bottle, $69 | about $1.15 | about $2.30 |
| GenuinePurity, 3 bottles, $65 each | about $1.08 | about $2.17 |
| GenuinePurity, 6 bottles, $59 each | about $0.98 | about $1.97 |
| GenuinePurity, subscription, $49 | about $0.82 | about $1.63 |
The honest reading: Nutricost is the cheaper bottle at every GenuinePurity tier. GenuinePurity also lists free shipping on orders of $89 or more. If cost is your only filter, the Nutricost NMN vs GenuinePurity NMN contest is not close.
Check the current GenuinePurity NMN price
Nutricost NMN vs GenuinePurity NMN Fact 3: what quality proof each page shows
In a Nutricost NMN vs GenuinePurity NMN check, quality proof means documents you can check, not adjectives. The Nutricost page states third-party testing by ISO-accredited laboratories, a GMP-compliant facility, and non-GMO, gluten-free, vegetarian-friendly status. In the page text we read, no certificate of analysis link appeared.
The GenuinePurity page states third-party lab testing, cGMP facilities in the USA, and links two certificates of analysis. It also calls itself FDA-inspected and organic. We could not verify those claims, and we did not open the PDF contents. Treat them as the manufacturer states, not as findings.
Even a certificate is only as good as its match to your bottle. See our guides on how to read an NMN certificate of analysis and how to choose quality NMN. The NCCIH warns that what is on a label may not be what is in the product.
USP offers a voluntary verification program that includes a GMP audit, product testing and a review of manufacturing documents. Neither page text we read mentions USP verification. Its absence is not a failure, but it is one more reason to ask for lot reports.
Nutricost NMN vs GenuinePurity NMN Fact 4: the guarantees differ
In the Nutricost NMN vs GenuinePurity NMN guarantee comparison, Nutricost states a 60-day money-back guarantee and says it refunds the purchase price minus shipping and handling. GenuinePurity states a 97-day money-back guarantee, limits refunds to one order per customer, and describes a 90-day trial on a two-bottle purchase in another passage.
The GenuinePurity page is not consistent between 90 and 97 days, so read the terms at checkout and keep your order email. A long guarantee helps only if you actually test how you feel and ask for a refund inside the window.
Nutricost NMN vs GenuinePurity NMN Fact 5: what human trials actually used
For the dose behind Nutricost NMN vs GenuinePurity NMN, start with a placebo-controlled trial in which older men took 250 mg of NMN daily for 6 or 12 weeks. Blood NAD levels rose and the treatment was well tolerated. Gait speed and grip changes were only nominally significant, and body composition did not change (Igarashi 2022).
In 108 older Japanese adults, 250 mg once daily for 12 weeks improved lower-limb function and drowsiness most in the afternoon group (Kim 2022). Both trials used 250 mg per day, which equals one capsule of either brand.
A 2025 meta-analysis of 12 randomized trials with 513 participants found NMN raised NAD, but most clinical outcomes were not significantly different from control. Risk of bias was a concern in all 12 studies, and the authors warned that benefits may be exaggerated (Zhang 2025).
A 2025 mouse study found that most orally given NMN was broken down by gut bacteria before absorption (Yaku 2025). It did not test either product here. Whether a phospholipid-based capsule changes this in people is not shown by those studies.
| Question | What the sources say |
|---|---|
| Do trials back 500 mg per day? | The two trials we opened used 250 mg per day |
| Does NMN raise blood NAD? | Yes, in the trials and the meta-analysis |
| Do most clinical outcomes improve? | Mostly not significant versus control (meta-analysis) |
| Is long-term safety established? | Not established; trials were short |
For dose context, read how much NMN to take daily and when to take NMN.
Nutricost NMN vs GenuinePurity NMN Fact 6: legal status is shared, not a tiebreaker
The FDA says it does not approve supplements for safety and effectiveness before they are sold. On September 29, 2025, two FDA letters concluded NMN is not excluded from the dietary supplement definition, with a notification still required (Venable summary, NPA report).
That status applies to NMN in general, so it favors neither brand. For the full background, see is NMN legal. Legal does not mean proven, and it does not mean every bottle is accurate.
Nutricost NMN vs GenuinePurity NMN Fact 7: a checklist beats brand loyalty
Use the same five checks on any NMN bottle, including in Nutricost NMN vs GenuinePurity NMN. First, match the capsule strength and the daily serving. Second, divide the price by milligrams. Third, ask for a certificate of analysis that names your lot. Fourth, read the refund terms. Fifth, talk with a clinician or pharmacist.
Reddit threads about Nutricost mostly ask whether the brand is legit and tested, which is the right question. Ask it of every brand, including the one we link. Our own review of the other brand is in Is GenuinePurity NMN legit and the GenuinePurity NMN review.
Who should pick which: Nutricost NMN vs GenuinePurity NMN
Nutricost may suit you if price is the priority, you accept a shorter 60-day guarantee, and you will email the company for a lot report. Taking 1 capsule instead of 2 also halves the monthly cost for the same 250 mg.
GenuinePurity may suit you if you want a stated 96% purity, linked certificates on the page, a longer guarantee and a subscription option, and you accept paying about three times more per capsule. See the official GenuinePurity NMN page for current terms.
Neither may suit you if you are pregnant, nursing, on medicines or managing a condition. Compare more options in best NMN supplements, or read NMN vs NR first.
See the official GenuinePurity NMN page
Safety and who should skip it
For anyone weighing Nutricost NMN vs GenuinePurity NMN, long-term human safety data on NMN is limited. Talk with a doctor or pharmacist before use, especially if you are pregnant, nursing, taking medicines or facing surgery. Stop and call a clinician if you notice side effects. Read NMN side effects and why people stop taking NMN.
Medical disclaimer: this article is educational and is not medical advice. Supplements are not approved to diagnose, treat, cure or prevent any disease. Results differ from person to person.
FAQ: Nutricost NMN vs GenuinePurity NMN
Is Nutricost NMN as good as GenuinePurity NMN?
No label can settle Nutricost NMN vs GenuinePurity NMN on quality alone. Both pages list 250 mg of NMN per capsule, so the difference is price, serving advice, and how much quality paperwork each page shows. Check the lab report for the exact lot before you decide.
Which has more NMN per capsule?
Neither, by the label. Nutricost lists 500 mg per serving of 2 capsules, which works out to 250 mg per capsule. GenuinePurity lists 250 mg per capsule and says to take 1 daily. The capsule strength is the same.
How much NMN did human trials use?
The two trials we opened used 250 mg per day: older men for 6 or 12 weeks (Igarashi 2022) and 108 older adults for 12 weeks (Kim 2022). Those trials do not show that a higher dose works better or is safer.
Is Nutricost NMN third-party tested?
The Nutricost page states third-party testing by ISO-accredited laboratories. In the page text we could read, we did not find a lot-specific certificate of analysis. Ask the company for the report for your lot.
Does GenuinePurity publish certificates of analysis?
The GenuinePurity page links two certificates of analysis and says it is third-party lab tested. We did not verify the contents of those files, so open them yourself and match the lot, the test method and the NMN percentage.
Is NMN legal to sell as a supplement in the US?
In two letters dated September 29, 2025, the FDA concluded NMN is not excluded from the dietary supplement definition. A new dietary ingredient notification is still required. Legal status is the same for both brands and says nothing about quality.
Which brand has the better guarantee?
Per their own pages, GenuinePurity states a 97-day money-back guarantee (with a note about a 90-day trial) and Nutricost states 60 days, minus shipping and handling. Read the refund terms at checkout, because they can change.
Does taking more NMN work better?
Not shown. A 2025 meta-analysis of 12 trials (513 people) found NMN raised blood NAD, but most clinical outcomes were not significantly different from control. More milligrams is not evidence of more benefit.
Is the cheaper bottle riskier?
Price alone does not tell you. A low price can reflect scale or margins. What matters is a lot-matched lab report, a clear label and a company that answers questions. Judge both bottles by the same checklist.
Who should talk to a doctor before taking NMN?
Anyone who is pregnant, nursing, taking medicines, scheduled for surgery or living with a medical condition. Long-term human safety data on NMN is limited, and supplements do not replace medical care.
Reviewed by: Dr. John Carter, PharmD, clinical pharmacist and lead scientific reviewer focused on supplement safety and drug-supplement interactions.
Sources behind this Nutricost NMN vs GenuinePurity NMN guide
- Nutricost NMN official product page (read 2026-10-19)
- GenuinePurity NMN official page (read 2026-10-19)
- Igarashi et al., 2022: chronic NMN in healthy older men (PubMed 35927255)
- Kim et al., 2022: 12-week NMN, sleep, fatigue and performance (PubMed 35215405)
- Zhang et al., 2025: NMN meta-analysis, glucose and lipids (PubMed 39116016)
- Yaku et al., 2025: NR and NMN gut microbiota conversion in mice (PubMed 40117359)
- FDA: information for consumers on using dietary supplements
- USP: dietary supplement verification services
- NCCIH: using dietary supplements wisely
- NIH Office of Dietary Supplements: dietary supplements, what you need to know
- NIH Office of Dietary Supplements: niacin fact sheet
- MedlinePlus: dietary supplements
- Venable: FDA declares NMN is not excluded from the supplement definition
- Natural Products Association: FDA reinstates NMN as a dietary supplement
