While there's some controversy over whether certain dyes may worsen symptoms of ADHD — and experts believe more research needs to be done to investigate these claims — there's no doubt that swapping processed foods for whole foods is healthier overall. I personally try to stay away from dyes, and always include fresh fruits and vegetables wherever I can. I believe that my diet is one of the most important factors in managing my symptoms, and I start to feel foggy after a few days of neglecting nutrient-dense foods.