The Mayo Clinic wrote in a Feb. 16, 2006 article titled "Attention-deficit/hyperactivity disorder (ADHD)," published on its website under the section "Mental Health":

“Over the years, a great deal of media attention has focused on diets for ADHD. Most diets involve eliminating additives and foods thought to increase hyperactivity, such as sugar and caffeine, and common allergens such as wheat, milk and eggs. So far, however, studies haven’t found a consistent link between diet and improved symptoms of ADHD.”

Feb. 16, 2006