Never a default

You were never the average.

You don't accept the default anywhere else that matters. Your supplement shouldn't be the exception, we read your gut and build a formula that could only ever be yours.

Build my formula → Compare Core & Advanced →

Nothing's charged until your formula is made.

Tim Wenisch Alexander Rončević NB1 science team

HYROX World Champions read their gut with NB1. Every formula signed off by our science board.

A personalised NB1 protocol box, printed with the member's own name

Every protocol is built and boxed for one person, printed with their name, dosed to their reading. Yours would look nothing like this one.

The default is a stranger

Off-the-shelf assumes a lot about you. All of it wrong.

Every supplement on a shelf is built for an average gut, a person assembled from a spreadsheet who doesn't actually exist. Same strains, same fibre, same dose, shipped to millions of different bodies and hoped for the best. The label says "everyone." Nobody is everyone.

The shelf
One formula. Everyone.

Dosed for a median that describes no one. If it happens to suit you, that's luck, not design.

Yours
Built from your reading.

Matched to what your gut actually showed, the exact species, the exact gaps. A formula that could belong to no one else.

You don't settle for the default anywhere else. So we stopped building for the average.

What arrives at your door

What's actually in your formula.

From a library of 125+ ingredients, only the ones your biology calls for, each dosed to your gut reading, health insights and medical questionnaire. Never a default.

One subscription, in place of greens powderprobioticomegamagnesiumadaptogens

An example kit, built for Leonardo M.
Built around your biology
An example kit, built for Leonardo M.
The living layer · taken any time of day
Precision Prebiotic Powder8g · daily
Why this dose

Fibre matched to his gut's fermentation machinery. The same fibre acts differently in different guts, so his is sized to his, not a fixed dose.

Inulin blend · 6gResistant starch · 2g
Morning protocol · taken with your first meal
Probiotic Capsule5 strains · AM
Why it's in Leonardo's formula

His Bifidobacteria measured low at 1.3%. These five strains are the ones matched to that part of his reading.

B. longum 1714B. lactis B420B. lactis BB-12L. acidophilus NCFMB. breve BR03+B632
Omega & Antioxidant Softgel2 softgels · AM
Polyphenol Capsule1 capsule · AM
Morning Wellness Capsule1 capsule · AM
Evening protocol · taken before bed
Magnesium Capsule300mg · PM
Evening Wellness CapsuleLeft out

✕ Evening Wellness was assessed and left out, his analysis didn't warrant it. Nothing is added by default.

128ingredients on file
19Live-culture
strains
16Prebiotic
fibres
20Vitamins &
minerals
73Active
compounds
Dr. Polina Novikova Prof. Dr. Dirk Haller Prof. Dr. Koen Venema
Science-board vettedOnly evidence-backed ingredients make the library.

Your reading typically draws on 15 to 25 of these. Which ones you get, and at what dose, comes from what your gut can actually do. The rest of the library stays on the shelf, never a default.

Magnesium
Mineral
Lactobacillus rhamnosus GG
Live culture
Vitamin D3
Vitamin
Inulin
Prebiotic fibre
Turmeric Root Extract
Botanical
Zinc
Mineral
Lactobacillus acidophilus NCFM
Live culture
Psyllium Husk
Prebiotic fibre
Nothing here is a default

A formula built around what your gut can actually use.

A shelf formula gives everyone the same strains and the same fibre and hopes for the best. Yours can't work that way. Once we can see what your gut can do, we build one formula for it and nothing else — no two come out the same, because no two readings are. Here's what goes into one, and how every choice gets made.

01First, the basics

The live cultures and prebiotic in your formula, dosed to work as one and decided by your reading.

On its own, it washes through + = Fed the right fibre, it stays and works
Live bacteria
Living bacteria you add to the gut, to top up the teams that are running short.
On its own, it washes through.
+
Prebiotics
The fibre those bacteria feed on. Their food source, nothing more complicated.
=
Combined
Both together: the exact fibre these strains can use, in the right amount, so they work as one system.
Fed the right fibre, it stays and works.
Live cultures
Living bacteria you add to the gut, to top up the teams that are running short.
Prebiotics
The fibre those bacteria feed on. Their food source, nothing more complicated.
Combined
Both together: the exact fibre these strains can use, in the right amount, so they work as one system.
02The cultures, up close

Living strains, with the evidence to back them.

We do not add generic bacteria. We use strains: specific, named, trademarked versions of a bacterium, each with its own published evidence. Which jobs your formula takes on, and which strains fill them, is decided by your reading. Here is the range, and one job worked in full.

A few of the jobs your reading might call for
and more, as your reading shows
One of them, in detail
Rebuild the bifido base
From your sample Added when your bifidobacteria read below their healthy range.
B. animalis lactis BB-12®The anchor. The most-studied bifido strain there is, and the best at feeding the rest of the chain.
If a metabolic angleB. lactis B420
If stress is in the pictureB. longum 1714
Your formula includes only the jobs your reading calls for, each one filled exactly like this.
03Precision prebiotics

A strain we add is only worth adding if we feed it.

Every strain arrives paired with the exact fibre it feeds on. Which fibres, and how much of each, follows how your gut ferments — the same fibre behaves differently in every gut. Generic fibre is a guess. This is matched and measured.

Too littleRight for youToo much
GOS
Inulin
PHGG
Beta-glucans
Not in your blend
Left out because your reading didn’t call for them.
A few fibres, chosen from dozens. Only the ones your strains can actually use, each paired to the strain it feeds and dosed to the range you handle. Too little does nothing, too much brings the bloat. Two people never get the same blend.
We never start with a formula and look for who it fits. We start with your gut, and let it decide what earns a place.
Dr. Polina Novikova Dr. Polina NovikovaNB1 Science
The people who won't take the average
You don't win HYROX by guessing. So why guess with your supplements?
Tim Wenisch · 2025 HYROX World Champion

The people who reach the top of anything don't accept the off-the-shelf version of it. Tim & Alexander read their gut with NB1, and hold the Men's Pro Doubles World Record: 47:40, London 2026.

Tim Wenisch
Tim Wenisch
2025 HYROX World Champion · Single & Doubles
Alexander Rončević
Watch
Alexander Rončević
2024 HYROX World Champion · Single
How it works

From sample to your first cycle. Here's how it starts.

When you're ready to start the clock, here's how it goes. Nothing's charged today, you leave your details and we post your kit first.

What arrives The NB1 gut kit: box, collection tube, instructions and transport bag
  1. 1

    Order your kit

    Choose a plan and check out. No charge today, we simply validate your card and post your kit.

  2. 2

    Read your gut at home

    A two-minute sample, sealed and posted back in the same box. Send it back within 30 days, a one-time £49 fee only applies if you don't.

  3. 3

    Your formula begins

    We read your sample and build your protocol. Your plan starts from there, posted monthly and recalibrated every cycle as your gut changes.

Not sure yet? Compare Core and Advanced side by side first, no card needed.

See the plans →

Two ways to read you.

Both start with your own biology. Core reads your gut. Advanced adds your blood and rebuilds your formula as you evolve. Nothing's charged until your formula is made.

Core
£94 /mo
or £99/mo, monthly · cancel anytime
We read your gut and build your formula from it.
Start with Core → Most informed
Advanced
£144 /mo
Gut and blood. Your formula rebuilds every cycle from your data.
Start with Advanced →

Four months is the minimum cycle, the window biology needs to shift. Prefer no commitment? Core runs month-to-month at £99. Prices shown in GBP; any currency conversion or FX fee is set by your bank.

Charged only on productionCancel after your first cycleReviewed by our science board
Never a default

Stop taking the average. Let your body tell us what you need.

We read your gut, build a formula that's yours alone, and recalibrate it every cycle. There's a four-month minimum, because biology takes that long to shift.

Order your kit →

Nothing's charged until your formula is made. Compare Core & Advanced →

Built from your biologyNothing charged until it's made.
Order your kit