Six things to check on a supplement label before you buy it
Dr Maciej Zatonski is a physician specialising in performance. The category is enormous and largely unpoliced, so he uses a checklist. It is short, it is boring, and most products fail it.
“A supplement is a claim about what is inside a capsule. The only question worth asking is who checked, and whether you can see the result.”
Everything below is a way of asking that question. None of it requires you to understand biochemistry.
Six checks, in the order they matter.
Every dose printed, no proprietary blend
A proprietary blend is a legal way of listing ingredients without saying how much of each is in there. It is almost always used to hide that the impressive-sounding ones are present in trace amounts. If you cannot see the milligrams, you cannot compare the product to the research it cites, and nothing further on this list matters.
Read the panel. Every active should carry its own number, not sit inside a blend total.
Someone other than the manufacturer checked
Third-party testing means an independent lab verified that the contents match the label and that contaminants are within limits. What matters is whether a brand names the standard it is tested against and the facility it is made in. A brand that does neither, and instead talks about how much it cares about quality, is telling you which of the two it has.
Look for a named testing standard on the site, not the words “rigorously tested” with nothing behind them.
The form matters more than the milligrams
A dose on a label is what went into the capsule, not what reaches your bloodstream. Compound form decides the difference: active folate rather than folic acid, magnesium glycinate rather than oxide, and an absorption aid where the molecule needs one. A large dose of a poorly absorbed form is an expensive way to make urine.
Look for the form named in brackets after each ingredient. Vague naming is usually the cheap form.
No fillers, no unnecessary excipients
Excipients are the non-active ingredients that make manufacturing easier - bulking agents, flow agents, anti-caking agents, colours. Some are genuinely needed. Many exist because they let a manufacturer put less active material in a bigger capsule. Every line on the ingredient list that isn’t doing a job is a line you are paying for.
Read past the actives to the bottom of the list. That is where the padding lives.
Named experts, and a board that can say no
Most supplement brands are marketing companies that commissioned a white-label formula. The question is whether anyone with relevant expertise was in the room, whether they are named, and whether they had authority to reject something. A review board that cannot say no is decoration.
Are the advisors named with checkable credentials, or is it an unattributed "team of experts"?
Testing the product, not just citing papers
Almost every brand cites published research on individual ingredients. Very few test the thing they actually sell. Running a trial on your own formula, with a university partner and an academic protocol, is expensive and can produce an answer you didn’t want - which is exactly why it is the strongest signal on this list.
Do the citations study the product, or only its ingredients in other people’s studies?
None of these tell you a supplement works. All of them tell you whether the brand is prepared to be checked.
Held to its own checklist.
Dr Zatonski joined the advisory board on the condition that the board could reject a formulation. It did, more than once, before the product went to manufacture.
Here is how MUTO answers each of the six, so you can hold it to the same standard as anything else in your cupboard.
Every dose printed in full
No proprietary blends. Each active carries its own number at the level used in the research it comes from.
Independent lab, named standard
Made in a UK facility to GMP ISO standard and tested by a third-party lab for purity and potency.
Active forms and an absorption aid
Active folate and B12, and BioPerine® at 20mg so the rest of the formula is absorbed rather than lost.
No fillers, no unnecessary excipients
Nothing in the capsule to bulk it out, colour it or make the manufacturing run cheaper.
Named founder, named board
Formulated by Dr Richie Barclay and reviewed by six named specialists with checkable credentials.
Its own trials, with universities
MUTO runs clinical research on its own formula in partnership with university teams, not only on its ingredients in other people’s studies.
Three jobs, no overlap, every dose printed.
The fuel your cells need
Raw material to make NAD⁺, plus the essentials to turn it into energy.
Keeping your NAD⁺ working
The body breaks NAD⁺ down as fast as it makes it. Protecting it matters as much as producing it.
Turning it into energy you feel
The final step: making sure that energy actually gets used.
Blood NAD⁺ against participants’ own baseline after 14 days of nicotinamide riboside supplementation.¹
Feel it before you see it.
Then check it against your data.
What customers notice first, in the weeks before any trend line moves. Open any of them for the mechanism.
The same four weeks, read on your own device. Every claim here is one you can verify yourself. Open any of them for the mechanism.
01
Energy that doesn’t spike
All day, no crash
Energy that doesn’t spike
All day, no crash
There are no stimulants in the formula, so there is nothing to come down from. What people describe is a flatter line - the afternoon dip going first, usually in weeks three to four.
02
Recover between sessions
Hard days cost less
Recover between sessions
Hard days cost less
The day after a hard session is where it shows. Repair is an energy-funded process, and funding it better means arriving at the next session with more of the last one absorbed.
03
Steadier mornings
Less fog on waking
Steadier mornings
Less fog on waking
Waking up is metabolically demanding. Most people notice mornings sharpening before anything appears on a wearable.
04
A calmer baseline
Fewer peaks and troughs
A calmer baseline
Fewer peaks and troughs
Less of the day spent braced. It is a subtle change and the one people describe last, usually after a month or more.
01
HRV
A validated recovery marker
HRV
A validated recovery marker
Heart rate variability reflects how much repair work your body managed overnight. Read the weekly average, not a single morning.
02
Recovery score
Calculated overnight
Recovery score
Calculated overnight
Whatever your device calls it, it is a composite of HRV, resting heart rate and sleep. The useful signal is the weekly average lifting.
03
Resting heart rate
Trend, not a single morning
Resting heart rate
Trend, not a single morning
Slower to move than HRV and harder to confound. A downward drift across a month is the cleaner read of the two.
04
NAD⁺ levels
The system underneath
NAD⁺ levels
The system underneath
The input the rest of it depends on. Published research found a 51% rise against participants’ own baseline after 14 days of nicotinamide riboside.
Reported timings are typical, not guaranteed. Individual results may vary.
Dr Zatonski is one of six who reviewed the formula.
MUTO was formulated by Dr Richie Barclay and reviewed by a six-person scientific advisory board before a single capsule was made. Every advisor is named, with credentials you can check.
Dr Alka Patel
Dr James Morehen
Dr Richard Mackenzie
Dr Maciej Zatonski
Dr Ash Kapoor
Dr Richie Barclay
£29 for your first month, then £55
A low-commitment way to try MUTO and see what your own data does. Up to 58% off versus the one-time price, and you can cancel at any point.
90 days, or your money back
Ninety days is long enough for your own numbers to say something, which is why it is the window we stand behind. Log your 30-day HRV and resting heart rate average before your first capsule so the comparison is honest.
If the data hasn’t moved by day 90, tell us and we refund you. No return of the empty pouches, no argument about how you felt.
The questions this usually raises.
There are hundreds of NAD⁺ products. Why is this one different?
Most of them answer one question out of three. Raising NAD⁺ is the easy part - what decides whether it does anything is how much survives, and whether the cell has the cofactors to spend it. MUTO is built around all three jobs, with every dose printed so you can check the formula against the research rather than taking a claim on trust.
Isn’t “no fillers” just marketing language?
It is, when nobody defines it. What it means here is that the capsule contains the actives and what is needed to hold them, without bulking agents, colours or flow agents added to make manufacturing cheaper. The way to verify that claim on any product, including this one, is to read the full ingredient list rather than the marketing.
What does an advisory board actually do?
It depends entirely on whether it can say no. MUTO’s board reviewed the formulation before manufacture and rejected versions of it. Every member is named with checkable credentials, which is the minimum test of whether a board is real or decorative.
What will I actually feel, and what will I see on my wearable?
There are no stimulants in it, so nothing in the first hour. Most people describe the afternoon dip going first, in weeks three to four, then steadier mornings and less of the day spent braced. On the device it is slower: HRV and resting heart rate typically start moving between day 30 and day 60, and both should be read as a weekly trend rather than a single morning. Feeling comes first, data confirms it.
Why do the doses matter so much?
Because research is done at a specific dose, and a product citing that research at a fraction of it is citing something that does not apply to what you are taking. MUTO prints every dose in full so you can check the formula against the studies yourself, and against whatever else is in your cupboard.
¹ Conze, D., Brenner, C., & Kruger, C. L. (2019). Scientific Reports, 9(1), 9772. Blood NAD⁺ measured against participants’ own baseline over 14 days of nicotinamide riboside supplementation.
² Self-reported survey of 87 men and women taking MUTO, aged 30 to 50, over 12 weeks. Individual results may vary.
MUTO is a food supplement and is not intended to diagnose, treat, cure or prevent any disease. It is not a substitute for training, sleep or a varied diet. If you are pregnant, breastfeeding or taking prescribed medication, speak to your doctor before use. Views expressed are those of the named advisor. Timings described are typical and not guaranteed; individual results vary.
NAD⁺ Cellular Complex
60 Capsules, 30 Servings
Supplements are regulated as food, not medicine.
A precision cellular supplement built to the standard that gap demands.
Nobody checks a supplement works before it reaches a shelf. No pre-market approval, no required efficacy data, no obligation to prove the label matches the capsule. That leaves the standard entirely up to the manufacturer. MUTO is 15 ingredients built to a specification we can show you: researched doses, disclosed in full, made in a GMP ISO-certified UK facility.
Every ingredient, every dose, printed on the label. No proprietary blends hiding the numbers.
GMP ISO-certified UK manufacturing, to a written specification. Not a white-label run with a brand printed on it.
One facility, one specification, every batch. You can see where it's made and what's in it.
15 ingredients chosen on evidence and formulated as one system, reviewed by a scientific advisory board.
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90-day money-back guarantee
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Third-party tested
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UK GMP ISO manufacturing
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6-person Scientific Advisory Board
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Independent research with Coventry, Westminster & Newcastle Australia Universities
Your 90-day MUTO journey
MUTO starts working from day one - beneath the surface, before your wearable has anything to show. This is the input building.
Steadier energy. Fewer crashes. A calmer baseline to train from. The system's compounding - you'll feel it first.
HRV is the honest number - your nervous system reporting on your cells. This is where the system beneath starts to show.
By day 90, it's not just felt - it's on the screen. The standard you hold above starts to show in the system beneath.
What your wearable measures - and what it doesn't
What your wearable measures - and what it doesn't
HRV. Recovery. Readiness. Sleep quality. Every one of those scores is your cells doing energy work well or badly, converted into a number. MUTO supports how the billions of cells in your body produce that energy - the input behind the output.
Rigorous testing standards
Rigorous testing standards
Our products are tested by independent third-party laboratories for heavy metals, microbes, and purity. We have ongoing research collaborations with three research institutions.
How it fits your stack - and when it doesn't
How it fits your stack - and when it doesn't
- Most NAD⁺ supplements give you a precursor and stop there. But making NAD⁺ is only the first of three jobs - skip the other two and you're paying to produce NAD⁺ your body loses or never turns into energy you feel.
- Produce - NR gives your cells the building block they turn into NAD⁺. Essential, but on its own it's one third of the job. It's where NMN and NR stop - and where MUTO starts.
- Protect - An enzyme (CD38) breaks NAD⁺ down almost as fast as you make it. Quercetin, Pterostilbene, Grapeseed and Turmeric slow that leak, so the NAD⁺ you produce actually sticks around.
- Put to Work - NAD⁺ in your blood isn't energy yet. CoQ10 and BioPerine® help your cells absorb it and turn it into energy you feel - not just a better number on a lab report.
- Produce without Protect is a leaking tank. Produce without Put to Work is fuel you never burn. NR and NMN do one job. MUTO does all three.
Clinically dosed, bio-available ingredients
Clinically dosed, bio-available ingredients
Nicotinamide Riboside (NAD+ precursor), quercetin, grapeseed and turmeric extracts, pterostilbene and CoQ10 - with a complete B complex including methylated folate and B12, plus D3, K2, zinc, copper and BioPerine® for absorption.
How to take it
How to take it
Take two capsules daily with your first meal. Most report a difference between weeks three and six. A daily system that builds a stronger baseline.
Delivery, subscription and guarantee
Delivery, subscription and guarantee
Free UK next-day delivery. Skip, pause or cancel anytime. 90-day money-back guarantee, click here to learn more.
A tool to support you and help you maintain your commitment.
Each quarter, one lucky winner will be announced by email and our social channels.
What people notice
when the system
starts working.