When to worry about unintentional weight loss with coeliac disease

Coeliac disease can damage the small intestine when gluten triggers inflammation. This may reduce absorption of nutrients and make meals cause bloating, pain, or loose stools, leading you to eat less. Weight may also fall if the disease is active, if the diagnosis is new, or if gluten is being eaten accidentally. Ongoing loss after starting a gluten-free diet deserves assessment because the cause may be continued exposure, another digestive problem, or a nutrition issue.

Book an appointment with your GP or gastroenterology team and record your weight trend, appetite, bowel changes, and foods or symptoms linked to meals. Do not start a restrictive diet beyond the advice already given, and do not remove gluten before planned testing unless your clinician has advised it. A dietitian can help protect energy, protein, iron, vitamin, and calcium intake while the cause is clarified.

Seek urgent medical help if you cannot keep fluids down, feel faint or confused, have severe abdominal pain, black or bloody stools, marked weakness, or signs of dehydration such as very little urine. Prompt review is also sensible for rapid ongoing loss, repeated vomiting, or swallowing difficulty. These warning signs need attention regardless of whether coeliac disease is already diagnosed.

Ask whether your coeliac disease appears controlled, whether your diet needs review, and which blood tests could check anaemia or nutrient deficiency. Ask when to involve a gastroenterologist or dietitian and how often to monitor your weight.