Okayama, Japan—Attention-deficit hyperactivity disorder (ADHD) affects 3–7% of school children, the American Psychiatric Association states. There could be a nutritional component to the condition, according to new data published in the Journal of Human Nutrition and Dietetics. A team headed by a Kurashiki City College researcher, based here, believes a soy-derived phosphatidylserine (PS) may help improve ADHD symptoms in kids.