 Thyroid function tests may be requested during blood tests to identify hypothyroidism, which is more common in people with coeliac disease.Osteopenia and osteoporosis, mildly and severely reduced bone mineral density, are often present in people with coeliac disease, and investigations to measure bone density may be performed at diagnosis, such as dual-energy X-ray absorptiometry (DXA) scanning, to identify risk of fracture and need for bone protection medication.Although blood antibody tests, biopsies, and genetic tests usually provide a clear diagnosis, occasionally the response to gluten withdrawal on a gluten-free diet is needed to support the diagnosis.