My son literally lived on milk products and crackers. When I removed these from my childs diet, not only did he break free of the limited diet, but he is now the first one to try something new. We did not see the dramatic results that some parents speak of, but he is now more focused, calmer and his language has doubled in 6 months. Dr. Madrona suggests one month, but I say give it at least 4 months. Some children go through a period of withdrawl and the behavior can be unbearable.
Parents often throw in the towel at that point.
They were the most painful weeks of my life. His behavior got worse. My son's teacher even supports the diet. She works with many autistic children and she told me that she has never seen one that didn't improve on the diet. She is amazed by my son's advances.