Performance & fitness
You want proof
You train with a wearable and read your own numbers. You check what is in things before you take them. Good. Your formula is built from the data you already trust — and every dose comes with its reasoning.
Personalised daily nutrition
define your day.define your body.define nutrition.
One daily formula, dosed to the milligram from 25+ research-validated ingredients. Built from your answers and your wearables.
Who it’s for
Unique to every body.
Health-conscious
You want personal
You already buy supplements — and suspect half the shelf does nothing. This replaces the guesswork: one formula, yours alone, every ingredient research-backed, every dose explained.
Longevity
You want the long game
Cognition, bones, heart — what matters now is not what mattered at thirty. Your formula is built around it, validated by our scientific team, and re-tuned every month as your body changes.
Wearable-native
Built from the data you already trust.
How it works
Three steps to one of one.
Take the questionnaire
An adaptive questionnaire, about five minutes. Connect your wearable if you like — Apple Watch, Oura, Whoop, Garmin. Optional, always.
We build your formula
Our engine translates your answers and your data into a single formula, drawn from 25+ research-validated ingredients. Our scientific team validates every one.
It adapts with you
Your body changes. So does your formula — re-optimised every month against your latest data and goals.
Why define
Precision, not a pile of bottles.
Your data leads
Sleep, recovery, activity — your wearable feeds your formula continuously. The dose follows the data, not the other way round.
Exact, not approximate
25+ ingredients, each quantified to the milligram for you. No round numbers. No one-size-fits-most blends.
Research first
Only research-validated ingredients make the shelf. Every formula is reviewed by our scientific team for dosage, interactions, and safety.
One dose, not a shelf
A month of your nutrition in one daily dose. The cluttered cabinet of bottles becomes a single quiet object.
The product
Your formula, sealed one day at a time.
Thirty peel-seal pods arrive each month. Peel one open, pour it into water or your morning shake — done in ten seconds, wherever the day starts.
Every pod carries its own QR code. Scan it and your live formula opens: each ingredient, its exact dose, and why it was chosen for you — in plain language, traced to the research.
Build my formulaFROM €99 / MONTH
The waitlist
Be first in line.
We launch in Paris soon. Leave your email and we will tell you the day your formula can be built.
Questions
Asked, answered.
What exactly is in my formula?
Your formula draws from a library of 25+ ingredients — vitamins, minerals, omega-3s, adaptogens — every one backed by published research. You see the full list with exact doses before you subscribe, and each capsule’s QR code opens the reasoning behind every choice.
Do I need a wearable?
No. The adaptive questionnaire is enough to build your formula. A wearable — Apple Watch, Oura, Whoop, or Garmin — sharpens it, because your sleep and recovery data replace estimates with measurements. Connecting one is optional, always.
Who validates the formulas?
Our scientific team reviews every formula before it ships — dosages, ingredient interactions, and upper safety limits under EU regulation. We use only research-validated ingredients at researched doses.
Define Nutrition is a food supplement, not a medicine. If you are pregnant, nursing, or on medication, speak with your doctor first.
How does the monthly re-optimisation work?
Each month, before your next batch is made, we re-run your formula against your latest wearable data, your check-in answers, and your goals. If something should change, it changes — and your update tells you what moved and why.
What does it cost?
€99 per month. Around thirty peel-seal capsules, your personal formula, monthly re-optimisation, and shipping. No commitment — pause or cancel any time.
What happens to my data?
Your data builds your formula. That is its only job. It is stored in the EU, never sold, never shared for advertising, and deleted on request. Even our website analytics are cookieless.