Ramona Verified
A reliable company
Everything is prompt and they really take care of every aspect of the experience. A reliable company I leave my gut health in the hands of with certainty.
Low on energy? Let’s start there.
Stress that won’t switch off? Let’s start there.
Struggling to sleep well? Let’s start there.
Going through menopause? Let’s start there.
On, off or thinking about GLP-1? Let’s start there.
Tried fixes that didn’t stick? Let’s start there.
5 questions · under a minute · no email needed
Building your starting point
- Reading your answers
- Matching what you’ve tried
- Selecting your plan
- Tried
- In 3 months
- Age
Why guessing doesn’t work
Generic products guess. They’re built for an average person, not for you. nb1 reads your gut first, then builds the formula from what it finds.
Multivitamins The same doses for everyone. Much of what you don’t need passes straight through.
Shop-bought probiotics A few strains picked for shelf life, without knowing what already lives in your gut.
Fibre or greens powders Dozens of ingredients at small doses, chosen to fill a label rather than a gap.
All-in-one supplement drinks One recipe for millions of people. It can’t adjust to what your gut needs.
Another gut test A long report and no next step. Here, your reading becomes your formula.
Protein shakes or powders They help you hit protein, but say nothing about what your gut is absorbing.
Fibre supplements One generic fibre, not matched to how your gut is changing.
Anti-nausea or digestive remedies They ease symptoms day to day without looking at the cause.
Eating smaller meals Sensible, but eating less makes what you do eat matter more.
Advice from my prescriber Focused on the medication, not on your gut bacteria.
HRT It works on hormones. It doesn’t read or feed your gut bacteria.
Herbal remedies Generic doses, chosen without knowing your biology.
Magnesium or sleep aids They help some nights without touching what drives the pattern.
Cutting out foods Often removes the fibres your gut bacteria depend on.
Apps or routines They track habits, but they can’t see what’s happening inside.
Seen a doctor Standard tests look for illness, not at what your gut bacteria are doing.
How nb1 works
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Week 1A gut reading, from home
A small sample in a few minutes, posted back free. Our lab reads it at species level.
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Week 4Your report, and a formula built from it
Your full health report, then your formula, presorted into morning and evening packs. Your first month is paid when you order.
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Month 4 · with AdvancedRetest and reformulation
Add retesting and blood markers and we read your gut again, then rebuild your formula from what changed.
Your gut analysis is worth £463. It comes with your plan.
This is what the reading gives you, priced as you'd pay for each part on its own.
- A full lab test of your gut bacteria We read the DNA of every microbe in your sample, down to species level. £149
- A simple guide to how your gut works What lives in your gut and what each group does for digestion, energy and mood. £29
- Which fibres your gut can digest The fibres your bacteria can break down, and the ones they can’t. £29
- How varied your gut bacteria are How many species you carry, set against 8,069 reference guts. £29
- Why your gut looks the way it does A scientist reads your results with your answers and explains what most likely shaped them. £69
- A food plan built for your gut Foods to add and cut back, chosen to feed the species you’re low on. £69
- Personal advice from a nutritionist Practical changes to diet, sleep and stress, based on your results. £89
You pay £463£0
Values are what each part would cost bought separately. They are included with every plan.
Six scientists stand behind every reading.
From four universities, with 290+ publications between them. A scientist signs off your formula before anything is made.
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Chief Scientific Officer Dr. Polina Novikova PhD Bioinformatics, University of Luxembourg -
Independent validator Prof. Dr. Dirk Haller TU Munich, Director of the ZIEL Institute -
Independent validator Dr. Koen Venema Gut microbiology, formerly Maastricht University -
Bioinformatics Dr. Monica S. Matchado Functional profiling, TU Munich -
Immunology & gut health Dr. Marijn Lewis PhD Biomedical Sciences, University of Zurich -
Clinical research Katia B. Otterstedt Clinical research and genomics
“You can't buy named probiotic strains as a consumer. They aren't sold, at any price. Matching individual strains to one person's gut is exactly what nb1 does. That's why I work with them.”
What changed, four months in
80.2
How members say they feel Before After
Digestion 8 → 3
Energy 6 → 3
Sleep 6 → 8
Stress 7 → 5
Our first 200 beta members, around four months into their protocol. The score is measured from the retest. The four ratings are self-reported on a 1–10 scale, not lab results, and individual responses vary.
From members, in their words
Trustpilot 4.5 out of 5
Ramona 
László Verified
Works as forecasted
It works as it was forecasted, already feel more energetic and my bloating already discontinued.
Sirko Verified
Straightforward and professional
The process was straightforward and professional throughout, with no friction anywhere. The results speak for themselves. I feel excellent.
Eugen Verified
A smarter way to understand your gut health
I can say they've made taking supplements much easier for me, since everything is already organized by them into morning and evening doses.
What you get each month
One rolling monthly plan. Add retesting and blood markers if you want to track what changes.
Monthly · no minimum term
nb1 Core
nb1 Advanced
£99 / mo
£149 / mo
- One month of your supplements, built from your reading Monthly
- Your gut analysis and full health report £463 → £0
- Free shipping Included
- Retesting and blood markers + £50
Pay £99 today. This is a rolling monthly subscription with no minimum term. Your first month, including VAT with free shipping, is paid at checkout. It then renews automatically every month at £99 until you cancel. You can cancel from your account or by contacting us, subject to the notice period in our cancellation policy.
Pay £149 today. This is a rolling monthly subscription with no minimum term. Your first month, including VAT with free shipping, is paid at checkout. It then renews automatically every month at £149 until you cancel. You can cancel from your account or by contacting us, subject to the notice period in our cancellation policy.
The things people actually ask
I've tried supplements before and nothing worked.
Everything you've tried was formulated before anyone knew anything about your gut. This starts from your sample. If your retest shows nothing moved, you'll be the first to know. The data is yours.
Do I actually have to take a stool sample?
Yes. Two minutes, at home, everything in the box, prepaid return. No pharmacy, no appointment. It's the least pleasant part and it's the reason the rest works.
Isn't microbiome testing unproven?
A single snapshot sold as a verdict is not reliable, and that criticism is fair. What we do is different in kind. Your sample is read at species level, your formula is built from that reading, and then it is read again and rebuilt against what changed. Reviewed by a five-person science board, run in an EU-certified lab. We will never tell you it diagnoses anything, because it doesn't.
Can I cancel?
Yes. It is a rolling monthly plan with no minimum term. Cancel from your account or by contacting us, subject to the notice period in our cancellation policy. You also get a full refund if you cancel within 14 days of your kit arriving and send the kit back intact.
How does the analysis work?
Shotgun sequencing, not a 16S screen: 200–400 species read at species level from your own sample. That reading is checked against the science board’s reference standards, and a person signs off your formula before anything is manufactured.
nb1 Core, £99 a month. You pay your first month today.
nb1 Advanced, £149 a month. You pay your first month today.
Not ready yet?
We'll email you this plan and your answers, so you can come back to it.