hyperactive preschool-aged boys whose parents reported the existence of sleep problems
or physical signs and symptoms. A within-subject crossover design was used, and the study
was divided into three periods: a baseline period of 3 weeks, a placebo-control period of 3
weeks, and an experimental diet period of 4 weeks. The experimental diet was broader than
those studied previously in that it eliminated not only artificial colors and flavors but also …