Authors: Patricia A. Stewart, PhD, RD; Susan L. Hyman, MD; Brianne L. Schmidt, RD; Eric A. Macklin, PhD; Ann Reynolds, MD; Cynthia R. Johnson, PhD, BCBA-D; S. Jill James, PhD; Patricia Manning-Courtney, MD. Parents of children with Autism Spectrum Disorder sometimes try nutritional supplements and dietary regimens such as gluten-free and casein-free diets without professional supervision in an attempt to improve their children's symptoms. In the largest study of its kind, researchers report that these well-intentioned efforts can result in both insufficient nutrients and excessive nutrients.(DOI: 10.1016/j.jand.2015.03.026).