Answer: The Gluten-Free/Casein Free (GF/CF) diet involves removing all food items that contain gluten or dairy. Gluten is a protein that is found in wheat, barley and rye so any products made from these items will have gluten in them. Casein is a protein found in milk. Dairy products such as yogurt, cheese, butter, and sour cream will have casein in them.
I have talked with many parents who, like me, have placed their autistic child on a special diet eliminating mainly dairy products and gluten. The elimination of dairy and gluten from the diet is also known as the GF/CF diet.