Is this a medical diagnosis?

No - only allergy testing or supervised elimination diets can diagnose intolerances. A Gut Day surfaces patterns to investigate with a professional.

How is this different from a generic FODMAP list?

Generic lists tell you what most IBS sufferers react to. A Gut Day tells you what YOU specifically react to, based on your own data.

Can I track multiple intolerances at once?

Yes. The insights engine doesn't pick one - it ranks all candidate triggers.

Does it work for histamine intolerance?

Yes. Aged cheese, wine, leftovers and cured meats are flagged as histamine-rich and tracked accordingly.

Pinpoint what your body doesn't tolerate

Find your intolerances - without an elimination month.

Lactose, gluten, fructose, histamine, FODMAPs… the list is long and the symptoms overlap. A Gut Day connects what you eat with how you feel - so the answer comes from your own data.

Find my triggers - free How it works

Why intolerance is so hard to spot

Intolerances rarely cause an instant reaction. Symptoms can hit 30 minutes or 24 hours later - long enough to forget the meal that caused them. A Gut Day records both sides of the equation: every meal and every symptom, with timestamps. The correlation engine does the rest.

How A Gut Day helps

Built for this exact problem

Lactose detection

We tag dairy ingredients automatically and flag patterns when symptoms cluster around dairy meals.

Gluten / wheat patterns

From bread to soy sauce, gluten hides everywhere. We surface it across all your logged meals.

FODMAP groups

Onion, garlic, apple, wheat, lactose - grouped by FODMAP family so you see categories, not just single foods.

Histamine + biogenic amines

Aged cheese, wine, cured meats, leftovers - flagged so you can spot histamine-driven flares.

Fructose & sorbitol

Apples, pears, stone fruits and 'sugar-free' products often share these. We group them.

Personalised, not generic

We don't tell you what 'IBS people' react to. We tell you what YOU react to.

How A Gut Day surfaces intolerances

1
Log meals + symptoms for 2–3 weeks
Consistency matters more than perfection. Photo, barcode or voice.
2
We group ingredients by family
Lactose, gluten, FODMAPs, histamine, fructose, sorbitol - automatically.
3
We rank patterns
'Lactose appeared in 6 of your last 8 flare-ups' - clear and concrete.
4
You confirm with your professional
Bring the data to your dietitian for a proper elimination/reintroduction plan.

Frequently asked questions

Is this a medical diagnosis?: No - only allergy testing or supervised elimination diets can diagnose intolerances. A Gut Day surfaces patterns to investigate with a professional.
How is this different from a generic FODMAP list?: Generic lists tell you what most IBS sufferers react to. A Gut Day tells you what YOU specifically react to, based on your own data.
Can I track multiple intolerances at once?: Yes. The insights engine doesn't pick one - it ranks all candidate triggers.
Does it work for histamine intolerance?: Yes. Aged cheese, wine, leftovers and cured meats are flagged as histamine-rich and tracked accordingly.

Stop guessing what's bothering you.

Two weeks of honest logging is usually enough to see clear patterns.

Start finding my triggers