Celiac disease is an autoimmune condition in which the immune system reacts to gluten — a protein in wheat, barley and rye — and can damage the lining of the small intestine. It may start at any age and can affect nutrient absorption. The sections below explain what celiac disease is, common signs, how it’s diagnosed, and general guidance for living with the condition.
Celiac disease is an immune-driven disorder triggered by gluten in genetically predisposed people, often associated with HLA‑DQ2 or HLA‑DQ8 genotypes. The immune response can injure the small intestinal lining, reducing its ability to absorb nutrients. The condition can present in different ways and requires specialist assessment for accurate diagnosis.
Symptoms range from gastrointestinal signs (diarrhea, constipation, abdominal pain, bloating) to extraintestinal features (fatigue, unexplained iron‑deficiency anemia, bone pain, or delayed growth in children). Dermatitis herpetiformis is a skin manifestation linked to celiac disease. Persistent digestive symptoms, unexplained nutrient deficiencies, weight loss, or growth concerns merit evaluation by a healthcare professional. If symptoms are severe or rapidly worsening, seek emergency medical care.
Evaluation typically begins with blood tests such as tissue transglutaminase antibodies (tTG‑IgA) alongside total IgA measurement. Accurate interpretation and, when indicated, confirmation with an intestinal biopsy are performed by gastroenterology specialists. People should continue consuming gluten until testing is complete to avoid false‑negative results. After diagnosis, periodic monitoring of symptoms and antibody levels, as well as nutritional assessment, supports long‑term care.
A strict gluten‑free diet is the primary approach to managing celiac disease and helps intestinal healing in many people. Practical measures include learning to read food labels, avoiding cross‑contamination, and seeking guidance from a dietitian experienced with gluten‑free diets. Follow‑up appointments help assess symptom improvement and nutritional status. For any concerns about supplements or specific nutrient deficits, consult a healthcare professional.
Celiac disease can occur with other autoimmune conditions such as autoimmune thyroid disease or type 1 diabetes. If left undiagnosed or poorly controlled, it may lead to malabsorption-related issues like anemia and reduced bone density, and in rare cases, more serious complications. Early diagnosis and ongoing medical follow‑up reduce these risks.
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