Coeliac disease testing and management
Finding out whether long-term symptoms are caused by coeliac disease, an immune reaction to gluten, and then managing it for life with a strict gluten-free diet and regular review.
✓ Medically reviewed by a GMC-registered consultant · last reviewed September 2026 · next review September 2027 · how we review
In short
- Coeliac disease is a lifelong immune reaction to gluten; the only treatment is a strict gluten-free diet, supported by a dietitian and regular review.
- Both the blood test and the biopsy only work while you are still eating gluten — do not start a gluten-free diet before testing is finished, or it may be impossible to confirm.
- Diagnosis usually means a blood test (tTG and total IgA) and, in adults, a confirming gastroscopy with biopsies; results take roughly 1–2 weeks each.
- A negative test does not always rule it out, and symptoms can have other causes, so ongoing problems should be reviewed rather than self-managed with a gluten-free diet.
A plain-English summary. The detail — including risks and recovery — is below.
At a glance
A general guide. Your specialist will give you advice for your situation.
Identifies whether long-term symptoms are caused by coeliac disease, so they can be treated rather than guessed at
Standard antibody testing is unreliable in people already on a gluten-free or low-gluten diet, who may need a supervised gluten challenge or specialist...
Your GP explains the antibody result. A clearly positive result usually leads to referral to a gastroenterologist; a borderline or negative result is...
Referral to a dietitian experienced in coeliac disease and clear, practical gluten-free advice.
Your GP explains the antibody result. A clearly positive result usually leads to referral to a gastroenterologist...
If arranged, this is a short day-case test with the usual brief recovery. Keep eating gluten until it is done...
Once coeliac disease is confirmed, you start a strict gluten-free diet, ideally with dietitian support. Many...
Symptoms usually settle and energy improves as the bowel lining heals. Any deficiencies, such as low iron, are...
What is coeliac disease testing and management?
Coeliac disease is a lifelong condition where the immune system reacts to gluten — a protein in wheat, barley and rye — and damages the lining of the small bowel. This can cause tummy symptoms, tiredness, anaemia, weight loss and, over time, problems such as weak bones, but some people have few obvious symptoms. It is an autoimmune condition, not the same as a food allergy or simple intolerance.
Testing usually starts with a blood test for certain antibodies (most often tissue transglutaminase, or tTG, together with a total IgA level). If this points to coeliac disease, the diagnosis in adults is normally confirmed by a gastroscopy with small samples (biopsies) taken from the small bowel. Both the blood test and the biopsy only work if you are still eating gluten, so you must keep gluten in your diet until the diagnosis is finished — eating gluten in more than one meal a day for at least six weeks beforehand.
There is no medicine that cures coeliac disease. The treatment is a strict, lifelong gluten-free diet, which lets the bowel heal and usually settles symptoms. Management also means dietitian support, checking for related problems such as iron, vitamin and bone deficiencies, and regular review.
Getting the diagnosis right matters. Starting a gluten-free diet before testing can hide the disease and make it very hard to confirm later, so the order of testing is important.
Types, options & approaches
There may be different ways to do this. The right approach depends on the clinical question and your circumstances.
Coeliac disease compared with gluten sensitivity
| Coeliac disease | Non-coeliac gluten sensitivity | |
|---|---|---|
| What it is | Autoimmune bowel damage | Symptoms without bowel damage |
| Diagnosed by | Blood test + usually biopsy | By excluding coeliac and wheat allergy |
| Bowel damage | Yes | No |
| Test while eating gluten | Essential | Coeliac must be ruled out first |
| Treatment | Strict lifelong gluten-free diet | Diet adjusted to symptoms |
Because the conditions are managed very differently, it is worth confirming or ruling out coeliac disease before settling on a label of 'gluten sensitivity'.
Preparing for your treatment
- Keep eating gluten until testing is complete — gluten in more than one meal every day for at least six weeks before the blood test, or the result can be falsely negative.
- Do not start a gluten-free diet 'to see if it helps' before you have been tested, as it can hide the disease and make a firm diagnosis very difficult.
- Tell your GP about your symptoms, any family history of coeliac disease, and conditions linked to it such as type 1 diabetes or thyroid problems.
- Bring a list of your medicines and any previous blood results, including iron, vitamin or bone-density tests.
- If a confirming gastroscopy is planned, follow the unit's fasting and sedation instructions and arrange an escort home if you choose sedation.
- If you have already cut out gluten and cannot face going back on it, say so before testing, so a specialist can advise on the best approach.
- Think about questions for the dietitian, as a gluten-free diet affects shopping, eating out, work and family meals.
What happens
Testing usually begins with a blood test arranged by your GP, checking for tTG antibodies and a total IgA level while you are still eating gluten. The result is normally back within a week or two.
If the blood test suggests coeliac disease, you are usually referred to a gastroenterologist, who in adults will normally arrange a gastroscopy. During this short camera test, small usually not painful samples (biopsies) are taken from the lining of the small bowel and examined under a microscope for the changes typical of coeliac disease. You should keep eating gluten right up until this test.
Once the diagnosis is confirmed, the focus shifts to treatment. You should see a dietitian with experience in coeliac disease, who explains how to follow a strict gluten-free diet and avoid hidden sources of gluten. You will usually have blood tests to check for iron, vitamin and mineral deficiencies, and your bone health may be assessed. From then on, management is about keeping to the diet, treating any deficiencies, and attending regular reviews to confirm the bowel is healing and symptoms are settling.
Is this treatment right for me?
A good consultation should explore whether it's the right choice for you now — including reasons to wait or consider something else.
May not be suitable if…
- Standard antibody testing is unreliable in people already on a gluten-free or low-gluten diet, who may need a supervised gluten challenge or specialist assessment instead.
- A gluten-free diet is not an appropriate 'treatment' before a diagnosis is confirmed, because it removes the ability to test accurately.
- Antibody results can be misleading in people with low total IgA, who need an alternative testing approach.
- Coeliac testing is not the right first step when alarm symptoms such as difficulty swallowing, significant weight loss or bleeding suggest a need for urgent investigation.
Delay or rearrange if…
- You have already stopped eating gluten and need advice on a gluten challenge before any blood test.
- You are too unwell for a confirming gastroscopy, until your condition is stable.
- You have an active infection or other acute illness that should be sorted first.
- Alarm symptoms are present that need urgent assessment in their own right before routine coeliac testing.
- You cannot yet arrange the dietitian support that good management depends on.
Alternatives to discuss
- No testing, with watchful waiting, if symptoms are very mild and there is no higher-risk feature — though testing is usually preferred before any dietary change.
- Testing for other causes of the symptoms, such as iron-deficiency anaemia, thyroid disease or irritable bowel syndrome.
- Genetic (HLA) testing to help rule coeliac disease out in difficult cases.
- An NHS pathway rather than self-funding, where time allows.
- Specialist review for non-coeliac gluten sensitivity or wheat allergy once coeliac disease has been excluded.
Before you decide
Use this as a shared-decision checklist. The aim is not just “can this be done?”, but whether it is right for you, now, with the risks and alternatives clearly understood.
What matters most to me?
Think about symptoms, daily life, work, caring responsibilities, sport, fertility, travel, appearance and anxiety — the right choice depends on your priorities, not just the medical facts.
What are all my options?
Ask about waiting, monitoring, medicines, rehabilitation, a smaller or larger procedure, a different test, NHS referral, or a second opinion where that would help.
What would make me pause?
Active infection, pregnancy, unstable medical problems, smoking, medicines that increase bleeding, poor support at home, or feeling pressured are all reasons to slow down and get tailored advice.
What happens if I do nothing today?
For some problems, waiting is safe; for others, delay can make treatment harder. A good consultation should explain the trade-off in plain English.
Benefits
- Identifies whether long-term symptoms are caused by coeliac disease, so they can be treated rather than guessed at
- A strict gluten-free diet usually settles symptoms and lets the damaged bowel lining heal
- Reduces the risk of longer-term problems linked to untreated coeliac disease, such as weak bones and persistent anaemia
- Allows related deficiencies, such as low iron, folate, vitamin B12 or vitamin D, to be found and corrected
- Gives access to dietitian support and regular review, and prompts testing of close relatives if appropriate
Risks & complications
- A blood test can be falsely negative if you have already reduced or stopped gluten, leading to a missed diagnosis
- Going back on gluten for a challenge can bring back symptoms for several weeks
- Adjusting to a strict gluten-free diet can be difficult, restrictive and sometimes more expensive
- Accidentally eating hidden gluten can cause symptoms and slow healing
- A confirming gastroscopy carries the small risks of any endoscopy, such as a sore throat, bloating or sedation effects
- Symptoms continuing despite the diet, usually because of hidden gluten but occasionally other conditions
- Nutritional gaps, such as low fibre or certain vitamins, if the gluten-free diet is not well balanced
- Test results being hard to interpret in people with low total IgA or who are already gluten-free
- A rare gastroscopy complication such as bleeding or a tear in the gut lining
- Refractory coeliac disease, where the bowel does not heal despite a strict diet and needs specialist care
- Other rare bowel complications of long-standing, poorly controlled coeliac disease
The biggest pitfall is testing in the wrong order: starting a gluten-free diet before the blood test and biopsy can hide coeliac disease and make it very hard to confirm later, sometimes leaving people unsure for years. The blood test is also not perfect — a negative result does not completely rule the condition out, especially if gluten intake was low or total IgA is deficient. Ask whether you are eating enough gluten for the test to be reliable, whether a biopsy is needed to confirm, and what the plan is if symptoms continue despite a strict diet.
Published figures to discuss
Coeliac disease is common, affecting around 1 in 100 people in the UK, though many remain undiagnosed. The accuracy of testing depends heavily on whether you are eating gluten: the tTG antibody test is sensitive when gluten intake is adequate, but can be falsely negative on a reduced-gluten diet, and false positives also occur, which is why a biopsy is usually used to confirm in adults. Genuine, source-defensible numbers for an individual's test accuracy depend on the laboratory and the clinical situation, so exact percentages are avoided here.
| Figure | Reported range | How to interpret it | Source / confidence |
|---|---|---|---|
| How common coeliac disease is | About 1 in 100 people in the general population | Risk is higher in first-degree relatives and in some autoimmune or chromosomal conditions, so family history matters. | NHS — Coeliac disease: diagnosisnhs.ukPublished figure |
| tTG-IgA blood-test sensitivity | About 93% positive in people with coeliac disease who are eating gluten | This figure depends on adequate gluten intake and normal IgA production. Total IgA testing helps avoid an IgA-deficiency false negative. | NHS — Coeliac disease: diagnosisnhs.ukPublished figure |
| False-negative testing after reducing gluten | Recognised and clinically important | Patients should not start a gluten-free diet before testing unless advised, because antibody tests and biopsy can become falsely reassuring. | Guide sourcesClinical context |
| Long-term complications if untreated or poorly controlled | Variable; anaemia and bone loss are more common concerns, lymphoma is rare but important | Good management includes dietetic support, nutritional blood tests, bone-health consideration and review if symptoms persist despite a gluten-free diet. | NHS — Coeliac disease: diagnosisnhs.ukSource-linked context |
These are literature figures, not a personalised prediction. Your own risks and likely benefits depend on your circumstances, your health, and how your care is carried out and followed up.
What happens afterwards
There is no physical recovery from the blood test, and only the usual short recovery from a confirming gastroscopy. What matters afterwards is getting a clear diagnosis, learning the gluten-free diet with a dietitian, and giving the bowel time to heal, which happens over months.
- Symptoms gradually improving over weeks once gluten is removed, rather than overnight
- A period of adjustment while you learn what you can and cannot eat
- Falling antibody levels on repeat blood tests as the diet takes effect
- Occasional symptom flares after accidental gluten, which settle again
- Taking iron or vitamin supplements for a while if deficiencies were found
Aftercare
- Follow a strict gluten-free diet for life — even small or occasional amounts of gluten can keep the bowel inflamed.
- Work with a dietitian to keep the diet balanced and to spot hidden sources of gluten in processed foods, sauces and some medicines.
- Take any prescribed iron, vitamin or mineral supplements as advised, and complete any treatment for deficiencies.
- Attend follow-up appointments and blood tests so healing and antibody levels can be checked.
- Tell other healthcare professionals, including pharmacists and dentists, that you have coeliac disease.
- Consider joining a coeliac support organisation for up-to-date food information and practical help.
- Discuss testing for close relatives, as they have a higher chance of also having coeliac disease.
- Go back to your team if symptoms persist or return despite a careful diet.
- Confirmation that you have been eating enough gluten before the blood test
- A clear plan for whether a confirming gastroscopy is needed
- Referral to a dietitian experienced in coeliac disease
- Blood tests for iron, folate, vitamin B12 and vitamin D arranged
- A plan for checking bone health if appropriate
- Information on gluten-free prescriptions and support organisations
- A clear point of contact if symptoms continue
- A plan for testing first-degree relatives
⚠ Get urgent help if…
- Difficulty or pain when swallowing — get this checked promptly
- Unexplained weight loss, ongoing vomiting, or vomiting blood or material like coffee grounds
- Black, tarry stools or visible blood in your stools
- Severe or persistent tummy pain that is new or different
- Symptoms that continue or worsen despite a strict gluten-free diet
- Severe tiredness, breathlessness or dizziness suggesting significant anaemia
- Any alarm symptom your clinician specifically told you to report
Who to contact: your clinician, clinic or test provider first (keep their number to hand). For urgent advice when you can't reach them, call NHS 111. In an emergency, call 999.
General guidance — it doesn't replace the specific advice your specialist gives you.
Results & realistic expectations
A positive antibody blood test, especially a high tTG level, makes coeliac disease likely, and in adults this is usually confirmed by finding the typical changes on a small-bowel biopsy. Together these give a firm diagnosis and the basis for lifelong treatment.
A normal or borderline result is interpreted alongside your symptoms and how much gluten you were eating. A negative test in someone eating plenty of gluten makes coeliac disease much less likely, but does not completely exclude it. If your symptoms continue, you should be reviewed rather than simply trying a gluten-free diet, because that can make any future testing unreliable.
Coeliac disease is lifelong. The gluten-free diet controls it but does not cure it, so gluten must be avoided permanently, even once symptoms have settled. Antibody levels usually fall over the first year on a strict diet and can be used to check how things are going. Because the condition and its effects on nutrition and bone health continue, regular review remains important throughout life.
Related tests, treatments or support
Investigating coeliac disease often goes hand in hand with blood tests for anaemia and vitamin levels, and sometimes a bone-density (DEXA) scan to check for weak bones. A confirming gastroscopy may also look for other upper-gut problems. People with type 1 diabetes, thyroid disease or a family history of coeliac disease are more likely to be tested. Your team should explain how these tests fit together.
Follow-up & long-term care
After diagnosis you should be referred to a dietitian and offered regular review, often within the first few months and then about once a year when things are stable. Reviews typically check symptoms, repeat tTG antibody levels (which should fall on a strict diet), look for nutritional deficiencies and consider bone health. You should be told who to contact if symptoms persist, return or change, as ongoing problems may need further investigation.
- Keep to a strict gluten-free diet for life, checking labels and being alert to hidden gluten.
- Attend regular reviews, usually about yearly once stable, to check symptoms, antibodies and nutrition.
- Have iron, vitamin and mineral levels rechecked as advised and treat any deficiencies.
- Look after bone health, including any recommended bone-density scans and vitamin D or calcium advice.
- Keep prescriptions, vaccinations (such as those advised for the spleen in some people) and support-group information up to date.
- Report new or returning symptoms promptly rather than assuming they are due to diet alone.
Repeat, follow-on and what comes next
- If you tested negative but had cut down on gluten, the test may need repeating after a proper gluten challenge.
- A biopsy taken too early, or while gluten intake is low, may be inconclusive and need to be repeated.
- Antibody levels are rechecked over time; if they do not fall, hidden gluten or, rarely, refractory disease is considered.
- Continuing symptoms despite a strict diet usually prompt review and sometimes further tests rather than simply tightening the diet.
Ask what happens if the result is unclear or needs repeating, and what is included if further tests or follow-up are needed.
What good aftercare looks like
- Referral to a dietitian experienced in coeliac disease and clear, practical gluten-free advice.
- A plan to recheck antibody levels and nutrition, with named follow-up.
- Attention to related issues such as iron deficiency, bone health and vaccinations where relevant.
- Clear advice on when and how to seek review if symptoms persist or return.
- Information about support organisations and about testing close relatives.
What affects the cost
Costs vary a great deal between people and providers, and we don't publish prices. What matters is understanding what drives the cost and making sure your quote is complete. The main things that affect it:
- Whether you see a private GP or specialist for assessment and referral
- The antibody blood tests and any genetic (HLA) test, charged by the laboratory
- Whether a confirming gastroscopy with biopsies is needed, including the endoscopist, unit and laboratory fees
- Dietitian appointments to set up and review the gluten-free diet
- Blood tests for iron, vitamins and minerals, and any bone-density scan
- Follow-up consultations and repeat antibody testing over time
- Any treatment for deficiencies, such as iron or vitamin supplements
- The consultation fee and what assessment it includes
- The cost of the antibody blood tests and any genetic test
- Whether a confirming gastroscopy and biopsy are included, and their separate costs
- Dietitian fees and how many appointments are expected
- The cost of follow-up blood tests, reviews and any bone-density scan
- How results are explained and by whom
- What happens, and what it costs, if results are borderline or further tests are needed
On the NHS? Coeliac testing, specialist referral, dietitian support and ongoing review are available on the NHS when clinically indicated; private care may be used for a faster appointment, but the same testing rules apply.
You're entitled to your total cost in writing — including reports, follow-up and what happens if the result is inconclusive — before you decide.
Consent traps and marketing red flags
These are not small details. They are often where patients lose choice, time to reflect, or realistic expectations.
Consent traps
- Not warning you that starting a gluten-free diet before testing can hide the disease and make diagnosis unreliable.
- Not checking total IgA, so a falsely negative antibody result is missed.
- Diagnosing coeliac disease on a blood test alone in an adult without explaining whether a biopsy is needed.
- No referral to a dietitian or plan for monitoring nutrition and bone health.
- No clear plan for what happens if symptoms continue despite the diet.
Marketing red flags
- Selling 'gluten intolerance' or food-sensitivity tests that are not validated for diagnosing coeliac disease.
- Recommending a gluten-free diet before proper testing has been done.
- Implying a single blood test can give a complete answer in all cases.
- Promising a 'cure' rather than lifelong dietary management.
- No mention of dietitian support, follow-up or testing of relatives.
Choosing a specialist safely
- Check the specialist is on the GMC Specialist Register for this area.
- Make sure they work at a CQC-registered service, and look for membership of the relevant Royal College or professional body.
- You're entitled to time to consider and to have your questions answered before you agree — the specialist who looks after you should explain it, not a salesperson.
- Be wary of pressure: time-limited offers or deposits taken before you've had time to think are red flags, not bargains.
- You're entitled to your total cost in writing — including any follow-up — before you decide.
Questions to ask your medical professional
Take this to your consultation. A good specialist will welcome every one of these.
- Am I eating enough gluten for the blood test to be reliable, and for how long?
- Do I need a gastroscopy and biopsy to confirm the diagnosis?
- What should I do if I have already cut down on or stopped gluten?
- Will I be referred to a dietitian, and what support is available?
- Which blood tests and bone checks should I have, and how often?
- What happens if my symptoms continue despite a strict gluten-free diet?
- Should my close relatives be tested?
- Are you on the GMC Specialist Register for this area, and which Royal College or professional body are you a member of?
- Will you be the specialist who carries out my treatment, and who looks after me afterwards?
- What are the risks for someone like me, and how often do your own patients have a problem or need it repeated or redone?
- What does a realistic result look like — and what can this treatment not achieve?
- What are my options, including waiting, doing nothing for now, or choosing a different approach?
- Can I have written information, results and aftercare instructions in a format I can use, including any accessibility or communication support I need?
- What is the total cost in writing, including any follow-ups, and how much time do I have to decide?
Frequently asked questions
Why can't I just try a gluten-free diet to see if I feel better?
How much gluten do I need to eat before the test?
Do I always need a biopsy, or is the blood test enough?
Is coeliac disease the same as a gluten or wheat allergy?
Will my symptoms go away once I stop gluten?
Can I get coeliac testing and care on the NHS?
Find a verified specialist for coeliac disease testing and management
Every consultant is GMC-checked and independently reviewed. Search by postcode and distance, or switch to a map. Ordered by rating, relevance and recency — never by who pays.
No verified consultants list this procedure yet — browse the full directory.
How we made this page
Medically reviewed by a GMC-registered consultant. Written in plain English, checked against NHS, NICE, GMC and relevant Royal College / specialist-society guidance, and kept under review. No clinic paid to appear on this page, and we publish no pricing. This is general information to help you prepare — it is not a substitute for advice from your own clinician. How we review our guides →
Source hierarchy: UK regulator and NHS/NICE guidance first, then relevant Royal College or specialist-society guidance, then peer-reviewed evidence for procedure-specific figures where available.
Sources & standards: NHS — Coeliac disease: diagnosis NICE NG20 — Coeliac disease: when you should be tested (information for the public) NICE NG20 — Coeliac disease: recognition, assessment and management Coeliac UK — Getting diagnosed Coeliac UK — Blood tests and biopsy (for healthcare professionals) Guts UK — Coeliac disease Celiac Disease Foundation — Coeliac disease testing
Reviews reflect patients' experience of care, not clinical outcomes. For procedure volumes and outcome data see PHIN.
Last medically reviewed 2026-09-21. Spotted something wrong or out of date? Report an error in this guide.
Related guides: Gastroscopy · Reflux (GORD) and heartburn management · Liver biopsy · Inflammatory bowel disease (Crohn's / colitis) management · Irritable bowel syndrome (IBS) management