The gluten free, casein free (GFCF) diet has been shown to be helpful for individuals with allergies to these particular foods and specifically in the management of autistic spectrum disorder (ASD). Proteins found in grain and dairy products, known as gluten and casein respectively, are believed to be poorly broken down in the digestive tracts in some people. When these proteins are not digested properly they can be absorbed intact into blood circulation. These proteins can affect the brain by crossing the blood-brain barrier and binding to opioid receptors. This can affect mood, concentration, mental performance and pain tolerance (i.e....