This comparison is published by VIVA. We make one of the products below, and we say so upfront. Every fact on this page is sourced, dated and linked so you can check it yourself. If we have got anything wrong, tell us and we will correct it within 48 hours.
NMN, HEAD TO HEAD
Two UK made NMN supplements, two different philosophies. One is a single ingredient at full dose. One is a blend. Here is everything we could verify about both, side by side, with sources.
4.9 from 13,000+ reviews
Facts only, no scores. Like for like on a 30 day, 500mg a day basis.
| Feature | VIVA NMN | BetterVits NMN Complex |
|---|---|---|
| NMN per daily serving | 500mg in one capsule | 500mg across two capsules of 250mg source |
| Other active ingredients | None. Single ingredient by design | Resveratrol 250mg, Quercetin 250mg source |
| Formula type | Single ingredient | Blend |
| Purity | 99.9% minimum, stated per batch | Not published on bettervits.co.uk as of 8 August 2026 |
| Batch lab certificates published | Yes, see our Transparency page | Not published on bettervits.co.uk as of 8 August 2026 |
| Third party tested | Yes, independent accredited laboratory | Stated as third party tested source |
| Verified customer reviews | 13,000+ reviews, rated 4.9/5 read them | "1K+ reviews" stated on their site as of 8 August 2026 source |
| Money back guarantee | 100 days policy | 60 days source |
| Price, 30 days, one time | £29.99 for 30 capsules | £45 for 60 capsules, a 30 day supply source |
| Price, 30 days, subscription | £22.49 with Subscribe & Save 25% | £40 source |
| Price per day, subscription | From 75p a day | £1.33 a day, £40 over 30 days |
| Made in | United Kingdom | United Kingdom |
| Where to buy | Direct from VIVA, vivanmn.com | Direct |
Prices and specifications checked on 8 August 2026. BetterVits figures from bettervits.co.uk and the BetterVits NMN Complex label. VIVA figures from vivanmn.com. Where a competitor beats us, the table says so.
We build VIVA around a single principle: one ingredient, at the full researched dose, tested to 99.9% purity, with nothing else in the capsule. When there is only one ingredient, there is nowhere for quality to hide. Every batch is tested and the certificates are published.
Blends are a legitimate different approach. BetterVits pairs NMN with resveratrol and quercetin, and states the dose of each. If you prefer a blend, the things worth checking are the same ones you would check for us: the dose of every ingredient, testing for every ingredient, and published certificates. We simply believe you should choose each ingredient deliberately rather than have the combination chosen for you.
Feel it or it's free. 100 days.
Verbatim, verified purchases, from our 13,000+ Loox reviews. These reviewers do not name the brands they tried first.
★★★★★
Having used Vivenmn for about six months with good results I made the mistake of trying another brand because it included resveratrol and quercetin and I decided to give it a try. Despite still containing 500mg of nmn, I noticed a big difference in how I felt. I have now taken a subscription to Vivenmn and I'm back on the right track.
★★★★★
This product is great; I've tried other brands thinking they must be the same but they certainly are not. Very quickly felt as though I had more energy and generally more "alive". I will be taking these for as long as I can I think.
★★★★★
I have returned back to this brand after using another brand - I find your brand much more effective - Thank you
BetterVits NMN Complex is a UK made blend of NMN, resveratrol and quercetin with stated doses and a 60 day guarantee. It is a legitimate product with a different formulation philosophy to ours. This page exists so you can compare the two on verifiable facts rather than marketing claims.
No, and the difference matters. This page is published by VIVA and says so at the top. Rankings you may see elsewhere, such as "Top 5" review sites, are sometimes published by supplement companies about their own products. Companies House and Google's Ads Transparency Center list clinical-reviews.com and bettervits.co.uk advertising under the same verified advertiser, BetterCo Ltd. We think comparisons should disclose who wrote them, which is why ours does.
Because doses you choose deliberately beat doses chosen for you. If you want resveratrol alongside NMN, you can add it at the dose you choose. Our capsule does one job at full strength.
VIVA offers 100 days; BetterVits offers 60. Both are money back guarantees; check each policy for conditions.
One capsule a day. 500mg of pure NMN. £29.99 for 30 days, or £22.49 with Subscribe & Save 25%.
Shop VIVA NMNMade in the UK. Third party tested. 100 day money back guarantee.
