What is autism spectrum disorder?What are the main signs and symptoms of autism spectrum disorder?How is autism spectrum disorder diagnosed?What are some of the main medical treatments for autism spectrum disorder?Have any supplements been studied for autism spectrum disorder?How could diet affect autism spectrum disorder?Are there any other treatments for autism?What causes autism?What nutrient deficiencies can arise from a gluten-free, casein-free (GFCF) diet?Are ADHD and autism connected?What are the criteria for an ASD diagnosis?Do the effects of autism spectrum disorder differ by sex?What other conditions are associated with autism spectrum disorder?What are the factors that contribute to the development of autism spectrum disorder?Do elimination diets help people with autism spectrum disorder?Can autism be helped by gluten-free, casein-free diets?