What must clients with celiac disease primarily avoid in their diet?

Clients with celiac disease must primarily avoid gluten in their diet. Gluten is a protein found in wheat, barley, and rye, which can trigger an autoimmune response in individuals with celiac disease. This response causes damage to the lining of the small intestine, leading to malabsorption of nutrients and various gastrointestinal symptoms. By strictly eliminating gluten from their diet, individuals with celiac disease can manage their symptoms and prevent long-term complications associated with the disease.

While dairy products, sugars, and fats can be part of a balanced diet, they are not inherently harmful to individuals with celiac disease unless there is an additional intolerance or allergy. Thus, avoiding gluten is the key dietary adjustment that clients with this condition must prioritize to maintain their health and well-being.