Individuals with autism, ADD, ADHD or PDD usually must restrict casein and gluten. Many people have severe allergies to dairy products or to wheat and grains and must eliminate those allergens from their diet. One must learn what products contain casein and gluten and must get used to carefully reading product labels. Once the parameters are understood, what seemed like an impossible diet to comply with becomes much more tolerable and doable. Unfortunately, it is not that simple.
Most prepared foods contain dairy products such as powdered milk, cheese or whey.
Soup mixes usually do as well. You must read the labels carefully to be sure dairy products are not present in these frozen or canned foods. You must also check bakery goods and snacks for the presence of the above casein sources. Reading the labels is a critical issue. There are acceptable casein free substitutes available.