Coeliac disease is a lifelong autoimmune condition in which gluten triggers an immune reaction that damages the lining of the small intestine. Gluten is found in wheat, barley and rye. The resulting inflammation can reduce the intestine’s ability to absorb nutrients, even when digestive symptoms appear mild.
The condition can develop at any age. Risk is higher in first-degree relatives of someone with coeliac disease and in people with type 1 diabetes, autoimmune thyroid disease, Down’s syndrome or Turner syndrome. Symptoms vary considerably. They can include diarrhoea, constipation, abdominal pain, bloating, indigestion, fatigue, unintentional weight loss and iron, vitamin B12 or folate deficiency anaemia. Some people develop dermatitis herpetiformis, an intensely itchy, blistering rash. Others have few obvious symptoms and are diagnosed during investigation of another problem.
Diagnosis comes before dietary exclusion
It is important not to start a gluten-free diet before testing. Reducing gluten can lower the antibodies used in blood tests and allow the intestine to begin healing, making the results harder to interpret. A GP can arrange coeliac antibody tests while gluten is still being eaten. Depending on the circumstances, confirmation may also involve assessment by a gastroenterologist and a small-intestinal biopsy.
Once coeliac disease is confirmed, treatment means avoiding gluten for life. This is not the same as choosing to limit wheat because it feels uncomfortable: even small, repeated exposures can damage the intestine and increase the risk of complications. Untreated disease can contribute to malnutrition, anaemia and osteoporosis. Proper treatment usually improves symptoms within weeks, although full intestinal healing can take longer.
Building a safe, balanced gluten-free diet
Wheat, barley and rye occur in obvious foods such as ordinary bread, pasta, cakes and biscuits, but also in less expected products including sauces, gravies, malt flavouring and some processed foods. Labels need to be checked every time because recipes can change. Shared toasters, chopping boards, utensils, spreads and cooking oil can introduce cross-contamination.
Oats do not naturally contain gluten, but ordinary oats are frequently contaminated during growing or processing. Only oats labelled gluten-free should be considered, and a small minority of people with coeliac disease may also react to the oat protein avenin. Their introduction is therefore best discussed with the dietitian or clinical team.
Naturally gluten-free choices include potatoes, rice, maize, quinoa, buckwheat, pulses, vegetables, fruit, eggs, unprocessed meat and fish, and most dairy products. A specialist dietitian can help ensure adequate fibre, iron, folate, calcium and other nutrients rather than allowing the diet to become dependent on refined gluten-free substitutes.
Temporary lactose intolerance can occur while the intestine is inflamed. This often improves after healing, so dairy does not necessarily need to be excluded permanently. If lactose-containing foods cause symptoms, seek advice on suitable alternatives and calcium provision.
Follow-up and nutritional assessment
An annual clinical review provides an opportunity to discuss symptoms, accidental exposure, dietary balance and the need for blood tests or bone-health assessment. Iron, vitamin B12, folate, vitamin D and other supplements should be based on identified needs wherever possible. Persistent symptoms deserve review: accidental gluten exposure is common, but another condition may also be present.
Useful supplements
Supplements should be selected for the individual rather than used automatically. Product directions and advice from an appropriately qualified professional should take precedence over general information.
| Supplement | Effects |
|---|---|
| Multivitamin and mineral formula containing zinc, vitamin C, B vitamins and selenium | Intended to support immune function, antioxidant protection and normal energy production. |
| High-strength, multi-strain probiotic | Intended to support immune regulation, inflammatory balance, nutrient absorption and the elimination of waste products. |
| Plant-based digestive enzyme formula | Provides enzymes intended to assist the digestion of proteins, fats, carbohydrates, lactose and plant fibres. It must not be relied upon to make gluten-containing food safe for coeliac disease. |
| Whole-leaf aloe vera juice | Intended to support bowel-flora balance, digestive-enzyme activity and the health of the intestinal tract, with an anti-inflammatory effect described in the source. |
| Krill oil | Provides EPA and DHA, which are used to produce compounds involved in regulating inflammation. |
| Vitamin D3 | Supports normal immune regulation and inflammatory balance. |
| Spirulina powder | Provides readily digested protein and is described as offering immune and anti-inflammatory support. |
These effects reflect the reasons given in the original article. Supplements do not prevent gluten from damaging the intestine and cannot replace a strict gluten-free diet. Digestive enzymes marketed for gluten are particularly important to distinguish from treatment: they do not make ordinary bread, pasta or other gluten-containing foods safe. Aloe products may cause digestive side effects, and vitamins or minerals can be harmful in excessive amounts or interact with medicines.
Coeliac disease is manageable, but successful management requires more than buying gluten-free products. Accurate diagnosis, careful avoidance of gluten, attention to cross-contamination, a nutritionally balanced diet and appropriate follow-up together provide the strongest foundation for long-term health.
Looking for personalised nutrition and lifestyle support? An FNTP member may be able to help you explore an approach suited to your individual needs. Find an FNTP practitioner.
This article is for general education and does not replace individual medical advice, diagnosis or treatment.
