A new study in the journal The Lancet says, "yes."
It found that when children between the ages of 4 and 8 were placed on a diet containing no processed foods for five weeks, ADHD symptoms diminished in 78 percent of them.
Also, when the suspect trouble foods were reintroduced into the diet, two-thirds of the children experienced a relapse in symptoms.
Experts say that in order for this diet to work, parents have to be very consistent with it.