Foods to be avoided are: foods with dioxin like apples, unless they are organic; foods with GMOs like corn, potatoes, soy, unless they are organic; all dairy because of numerous reasons, mainly casein; all wheat also due to numerous reasons, but mainly gluten; MSG in almost all processed foods, disguised as natural flavoring and other names; aspartame, commonly called Nutra-sweet; other flours containing gluten, like barley and rye; and all fish unless tested or processed to remove toxins.Foods considered benefical are: cod liver oil that is processed or tested to be free of detectable toxins; mandarin oranges; pinapple, all vegetables, espeically artichoke, parsley and broccoli sprouts, red or dark grapes, citrus fruit in general, pears, pomegranite, blue berries, pretty much all fruit and vegetables and thier juices. Remember no apple unless organic! Eggs, meats (not those with perservatives), some spices, like ginger root, turmeric, oregano. They do sell gobs of organic foods and gluten-free foods at grocers in all big cities, and over the Internet. Plus, there are lots of websites and books and forums that talk about this. If there is a food your child craves, he is either allergic to it or it contains something that helps him. This may help you determine if there are foods he commonly eats that may be triggering symptoms. Digestive enzymes and probiotics are usually given because individuals with autism have great difficulty digesting their foods to get the nutrients from them. Foods can actually be detrimental to them when they don't digest, and then oxidize in their blood-stream. My kids do so great on this diet that its the difference between lots of symptoms or no symptoms. They are recovered, but still dependent upon diet and supplements. If they drink one soda, numerous symptoms come back and last a week. If they return to eating wheat, after a few weeks, they have numerous symptoms return which take months to rid. Thus, diet can be very effective at ridding symptoms. They also recieve treatment for pathogens and toxins, which should bring about a more permanent loss of symptoms. But, I do suggest going to some forums and getting more information on a daily basis. Yahoo Groups has some great autism forums.