A study suggests that people with high IQs face a greater risk of psychological and physiological disorders compared to the general population. Drawing from a survey of 3,715 Mensa members with IQs above 130, the researchers found notably higher rates of mood disorders, ADHD, and autoimmune diseases among the group. Lead author Ruth Karpinski posits a “hyper brain/hyper body” theory, explaining that highly intelligent people may have an overreactive nervous system that contributes to these ailments.