Chris's Code Corner
An independent review and discount-code page — not the official vivanmn.com website.
Chris's Code Corner
An independent review and discount-code page — not the official vivanmn.com website.
Code checked 21 September 2026.
Looking for a working vivanmn code before you order your NMN capsules? Mine is below — it takes 25% off at checkout, which puts 90 capsules at £45.00 instead of £59.99.
One product, three tub sizes. Tap any of them and you'll land on the vivanmn checkout with that pot in the basket and the 25% already taken off — no typing the code in.
30 capsules
£29.99
£22.50
75p a day · 1 month
Go to checkout →
60 capsules
£49.99
£37.50
63p a day · 2 months
Go to checkout →
Best value
90 capsules
£59.99
£45.00
50p a day · 3 months
Go to checkout →
One capsule a day is the standard serving. Prices are vivanmn's and can change — the checkout total is the one that counts.
“Hard to explain. But I feel so much more chilled and the energy levels have been on a different level. No more Nanny naps in the afternoon and my gym gains have been amazing. But the overall experience has been subtle, so don't expect sudden rush like the limitless pill.”
Wayne S. · Verified buyer
“Great product been taking for around 3 months have so much more energy every day.”
Gillian S. · Verified buyer
“Really pleased with these NMN tablets. Easy to take, good quality, and I've noticed a positive difference since using them. Great value and I would definitely recommend them.”
Andrew D. · Verified buyer
“I've been using fake nmn for a while. When I went straight to viva, I noticed a difference almost straight away. Within a few days. Such a wonderful product, but go to viva for it. Too many fakes out there.”
Neal M. · Verified buyer
“Just feel so much better taking these! Will keep ordering. Going to start a subscription and I don't do that very often!”
Christina C. · Verified buyer
“Love using it. Have been for 12 months now and can tell the difference.”
James S. · Verified buyer
Other people's words and other people's experiences — not claims about what NMN will do for you, and not everyone rates it. The full set, including the critical ones, is on vivanmn's own reviews page.
Most pages selling this stuff wave at "cellular health" and move on. Here's the actual mechanism, in plain English, and then what the human trials found — including where they came up short.
Everything hinges on one molecule: NAD+ (nicotinamide adenine dinucleotide). Every cell you own uses it, and levels of it fall as you get older. NMN — nicotinamide mononucleotide — matters because it is the direct precursor: one enzymatic step (via the NMNAT enzymes) converts NMN into NAD+. That's the whole premise of the supplement. Take NMN, give the body the raw material for NAD+.
NAD+ is the shuttle your cells move energy on. When you break down glucose (glycolysis), run the Krebs cycle, or burn fat, each of those reactions strips electrons out of the fuel — and NAD+ is what catches them, becoming NADH.
NADH then carries those electrons to the electron transport chain inside your mitochondria, drops them off, and comes back as NAD+ ready to go again. The chain uses them to make ATP: the actual currency your muscles and brain spend.
So NAD+ isn't a fuel — it's the conveyor belt. If the pool of it shrinks, fuel is still there but less of it reaches the point of being spendable. That's the reason the "tired despite eating fine" complaint keeps coming up in NAD+ research.
NAD+ has a second job that has nothing to do with energy: a family of enzymes literally consume it to do maintenance work.
The sirtuins (SIRT1–SIRT7) are the famous ones — they cannot function without spending NAD+, and they regulate mitochondrial biogenesis (through PGC-1α), stress responses and how DNA is packaged. PARP enzymes spend NAD+ repairing damaged DNA. And CD38, which also burns through NAD+, becomes more active as you age.
That's the squeeze at the centre of the whole field: as you get older, demand for NAD+ goes up while supply goes down. Less left over for the sirtuins and the repair crew. Topping up the precursor is an attempt to relieve that squeeze — which is the theory, not a proven outcome.
Muscle insulin sensitivity improved — but the NAD+ increase itself wasn't detected. A 10-week randomised, double-blind, placebo-controlled trial in postmenopausal women with prediabetes found insulin-stimulated glucose disposal and muscle insulin signalling both rose on NMN and didn't on placebo. The authors were straight about the caveat: they could not detect a change in muscle NAD+ content.
Yoshino et al., Science, 2021
Aerobic capacity improved in runners, dose-dependently. 48 amateur runners, six weeks, randomised into 300mg, 600mg, 1200mg a day or placebo alongside training. The higher doses improved how well muscle took up and used oxygen. No adverse effects were reported up to 1200mg a day.
Liao et al., Journal of the International Society of Sports Nutrition, 2021
NAD+ metabolism rose and it was well tolerated — the headline outcome missed. 36 healthy middle-aged adults took 250mg a day for 12 weeks. NAD+ metabolism went up and there were no adverse events, but arterial stiffness only trended downwards; the difference against placebo was not statistically significant.
Katayoshi et al., Scientific Reports, 2023
One capsule here is 500mg, which sits inside the 250–1200mg range those trials used. That's a comparison of doses — not evidence that you'll get the same results.
A single product: Pure NMN, 500mg of nicotinamide mononucleotide per capsule, in a vegetable cellulose shell. Nothing else in the tub.
Product photography © Viva Research Ltd.
Or skip all of that — the three buttons above drop the pot in your basket with the code already applied.
vivanmn is a UK company (Viva Research Ltd, London) selling NMN capsules. NMN occurs naturally in the body and has become popular with people interested in healthy ageing; the brand positions its capsules as supporting energy and cellular health as you age.
Those four points are taken from vivanmn's own site.
I've been taking the NMN for four months now. The thing I noticed first wasn't dramatic — it's a subtle, steady energy I simply didn't used to have. The clearest sign is what happens after work: I'm willing and able to do more, where before that was when I'd run out.
That's shown up most obviously in the gym. I've roughly doubled both my output and the time I actually spend training — not because I decided to, but because I had it in me to.
The other change crept up on me. My outlook has lifted and my mood has shifted in a positive direction almost without me realising it was happening. Four months in, I can see first hand why people talk about NAD levels the way they do, and I won't be stopping now.
That's my own experience, not a promise of what it'll do for anyone else — everyone's different, and NMN isn't a medicine.
25% comes off at checkout: 30 capsules £29.99 → £22.50, 60 capsules £49.99 → £37.50, 90 capsules £59.99 → £45.00. vivanmn set the prices, so check the total on the checkout page before you pay.
The code applies at checkout for any order. If the box rejects it, make sure there's no other promotion already applied.
Occasionally vivanmn run their own seasonal promotions, like bundle deals. When they do, use whichever saves you more — the checkout will usually only accept one code.
One capsule is 500mg of nicotinamide mononucleotide. Published human trials have used roughly 250mg to 1200mg a day, so one capsule sits inside the range that's been studied. That's a comparison of doses, not evidence of a benefit.
vivanmn advertise a 100-day money-back guarantee, so you can return the capsules for a full refund within that window.