Wheat/gluten can take a long time to clear. I think the typical suggestion is to pull it for at least six months. Some say 12. Believe me...it is way easier to pull it on a kid who doesn't totally realize what you are subbing on him than one who does realize it. You may want to look into have him tested for food allergies as well. We did this with DS and although he did not have a wheat or dairy allergy (but clearly does have an intolerance to them), he did have a couple others that we did not know about at all. You may want to post on the allergies forum for more GFCF info. For instance, something like 80% of kids who react to dairy also react to soy, so you would likely want to pull soy too. A really good book we read was called Feast Without Yeast by Dr. Bruce Semon. He has a son with autism and is himself a psychiatrist who has a regular practice, but also offers patients a more holistic natural approach to treatment as well. The book is on Amazon. He has a list of foods he suggests pulling in addition to GFCF. We have noticed that DS reacts to many of those foods even more than gluten, although dairy turns him into a total terror immediately. If you want me to pm the food avoidance lists to you, let me know and I can do that, although it is helpful to read his explanations and the book also has tons of recipes, though many are not GFCF which is the third step of four in how he removes foods. Personally, we just did the GFCF and all his first two lists right away. Also, in terms of sticking with the diet even when you don't think it is helping....individual kids have different food reactions. We had been GFCF plus all food allergy positive foods free for months but still knew something was not quite right when we figured out DS reacted to sunflower oil which is in everything. Pulling that made a huge huge huge difference. The diet thing can be tricky, but many have great results, so I'd encourage you to stick with it for quite some time even if it doesn't seem to be helping immediately. It is definitely overwhelming the first month or so. I cried in the grocery store... But, a few weeks into it, we were pros and cooking/shopping were as easy as ever.