My wife and daughters recently visited a cousin who may be on the autism spectrum. The cousin is being seen by early interventionists (incidentally, my mother’s profession), but has yet to be officially assessed. I was distressed to hear that, despite the fact that this cousin has yet to be diagnosed, my sister-in-law has placed him on a gluten and casein free diet, an unnecessary restriction that is not based on proper scientific evidence . Gluten is a starch protein ingredient in wheat, rye