“I don’t eat gluten” can cover three very different medical realities — and mixing them up fuels both the mockery (“it’s just a trend”) and the real dangers (“a little bit can’t hurt”). Here’s what sets them apart.

The three conditions at a glance

Coeliac disease Non-coeliac gluten sensitivity Wheat allergy
Mechanism Autoimmune disease Poorly understood so far Classic allergy (IgE-mediated)
Target Gluten (all sources) Gluten and/or other wheat components Wheat proteins only
Reaction Damage to the small intestine, even without felt symptoms Digestive and general symptoms, without intestinal damage Rapid reaction: hives, swelling, up to anaphylaxis
Diagnosis Blood test (antibodies) then biopsy By ruling out the other two Allergy testing
Zero tolerance? Yes — traces count Varies by person Yes for wheat; rye and barley often tolerated

Coeliac disease: an autoimmune disease, not an intolerance

In a person with coeliac disease (around 1% of the population, the vast majority undiagnosed), eating gluten triggers an autoimmune reaction that destroys the villi of the small intestine. The consequences go well beyond digestive discomfort: deficiencies, anaemia, osteoporosis, fertility problems, chronic fatigue.

Two points change everything in practice:

  • The reaction happens even without symptoms. A coeliac who “feels nothing” after a contamination still suffers intestinal damage. That’s why the diet must be strict for life, traces included.
  • Diagnosis requires still eating gluten. Antibody tests (anti-transglutaminase) and the biopsy are only reliable if gluten is still being consumed. Stopping gluten before testing is the classic mistake that skews everything.

Non-coeliac gluten sensitivity: real, but different

Bloating, pain, brain fog, fatigue after eating gluten — without coeliac antibodies or a wheat allergy: that’s the picture of non-coeliac gluten sensitivity. It’s still poorly understood (some researchers point to other wheat components, such as fructans), but the discomfort is very real.

A major practical difference: there is no known intestinal damage. How strict to be is therefore a matter of personal comfort — some people tolerate traces, others don’t. That’s why Nutrixe distinguishes the coeliac mode: what counts as “gluten-free enough” for a sensitive person isn’t necessarily enough for someone with coeliac disease.

Wheat allergy: an allergy like any other

Wheat allergy is an immediate reaction (minutes to hours) to wheat proteins, mediated by IgE antibodies: hives, swelling, breathing difficulties, and in severe cases anaphylactic shock. It mostly affects children (it often disappears with age) and is diagnosed through allergy testing.

A surprising subtlety: a person with a wheat allergy can sometimes eat rye or barley — forbidden to coeliacs — but must watch out for gluten-free products containing… deglutenated wheat starch, allowed in gluten-free products in Europe because it’s been stripped of its gluten, but not of all its allergenic proteins.

What this changes at a restaurant

  • Coeliac: a dedicated kitchen or a serious anti-contamination protocol. That’s the “100% gluten-free” level on our listings, and the meaning of our coeliac mode.
  • Sensitive: a gluten-free menu prepared in a mixed kitchen may be enough, depending on your tolerance.
  • Wheat-allergic: report an allergy (the word triggers mandatory allergen protocols), not “a diet”.

This information does not replace medical advice. If you suspect you have one of these conditions, talk to a doctor — and don't remove gluten from your diet before being tested.

Want to see where you can eat with peace of mind, whatever your profile? Explore verified addresses — every listing states the exact gluten-free level and any risks observed.