You can check the ingredient list on the labels to see if foods have these ingredients. Gluten is not inherently "bad" or harmful for people with ADHD. However, Naidoo says if someone with ADHD ...

which asked them to go through a 28-item list of foods and beverages and indicate how often they consumed each one. They also reported whether they had been diagnosed with ADHD. Their parents also ...

To avoid potential issues, children with ADHD should steer clear of ... if red dye 40 is one of the first ingredients on the ...