This reply was originally posted by user Tjree221 in ADDitude’s now-retired community.
My 10 year old son has obvious reactions to foods that worsen his ADD symptoms. He gets angry and aggressive if he eats dairy products. He gets anxiety and cannot concentrate if he eats sugar. We notice that gluten makes his skin break out so we usually avoid that as well. Usually the reaction happens the day after he eats the food and can last up to 3 days. We usually maintain a strict diet otherwise our family will be in constant crisis at home.