Coeliac Disease: Separating Myth From Guidance
Coeliac Disease: what people commonly get wrong, set against what published UK guidance says.
It is substantially underdiagnosed, and removing gluten before testing makes the diagnosis much harder to establish.
Key takeaways
- Trigger: gluten, found in wheat, barley and rye
- Testing: blood tests, then usually an endoscopy with biopsy
- Most useful single change: Ask for testing before removing gluten from your diet.
- Commonest mistake: Going gluten-free before testing, which invalidates the results.
- See a doctor if any of the signs under "When to speak to a doctor" below apply to you.
What the guidance actually says
The published position, before we get to what people believe instead.
| Measure | Figure |
|---|---|
| Trigger | gluten, found in wheat, barley and rye |
| Testing | blood tests, then usually an endoscopy with biopsy |
| Crucial | keep eating gluten until testing is complete |
| Treatment | a strict lifelong gluten-free diet |
| Oats | need to be certified gluten-free; a minority react to oats themselves |
Where people go wrong
All of these come up regularly. All of them run against the published position.
- Going gluten-free before testing, which invalidates the results
- Assuming "may contain" products are safe
- Ordinary oats, which are cross-contaminated in milling
What to do instead
- Ask for testing before removing gluten from your diet
- Keep eating gluten in more than one meal a day until tests are done
- Ask for dietitian referral after diagnosis
- Check first-degree relatives, who are at higher risk
The part that is genuinely uncertain
Guidance changes, and it changes because evidence does. The figures above reflect current UK guidance from the bodies named at the foot of this page; where those bodies revise their position, theirs is the account to follow rather than this one.
Where to go next
- The Short Guide to Coeliac Disease
- Coeliac Disease: What Published Guidance Supports
- Coeliac Disease — the reference entry
- Bloating: Sorting the Evidence From the Noise
- Diarrhoea: What Published Guidance Supports
When to speak to a doctor
See a GP for persistent diarrhoea, bloating, unexplained weight loss, mouth ulcers, fatigue or iron deficiency anaemia. Do not remove gluten before testing. Seek urgent assessment for severe abdominal pain, persistent vomiting or blood in the stool.
Where this comes from
- NICE — Coeliac disease: recognition, assessment and management
- Coeliac UK — getting diagnosed
How this page was put together
Every figure, recommendation and warning above is taken from the guidance named in Where this comes from. Nothing on this page is inferred, summarised or generalised beyond what those bodies publish: where they give a number, it is their number, and where they are silent, so are we. Pages are rebuilt whenever the underlying record changes. Sign-off by a named clinician, where it has happened, is shown at the top of the page along with the date.
Medical disclaimer
This article is general information, not medical advice. It cannot account for your own history, medication or circumstances. Always speak to a GP, pharmacist or another qualified health professional before making changes that affect your treatment, and never delay seeking medical advice because of something you have read here. In an emergency, call 999.
Spotted something wrong? Report an error on this page. We correct on the page and say what changed.
