The popular Feingold Diet identified food additives as a cause of ADHD. However, a2011 study by the FDA found that behavioral change “is not due to an inherent neurotoxic property of the food or food components.” It did note, though, that there could be intolerance issues for some chemicals by some children who may be predisposed to behavioral issues; the chemicals may cause hyperactive behavior but not necessarily the condition. Read more from the FDA presentation.