Asperger's and casein free diets

I have been very pleased with the response of some of my Asperger's patients with casein-free diets. Casein is the protein in milk. It is not only in dairy products but used as fillers in processed foods such as hot dogs and bologna, etc. One young man (about 8 years old) who had classic symptoms of Asperger's and was quite irritable, conflictual with peers and staff, and obsessive-compulsive/perseverative, did so much better on the casein restriction and all the social difficulties and irritablitiy and perseveration diminished. Because he kept insisting he wanted his milk back, we started him back on the milk products and his symptoms all returned. What was interesting in his history was that he was colicy as an infant and after several milk/formula changes he did much better on soy milk. It is my opinion that though at some point he resumed dairy products, he was still intolerant and it created the symptoms we were seeing. While we was the results werre seen within a short period of time ( a couple of days), researchers recommend a good month trial on the diet retriction.