Subject matter of the present invention is supplementation for treatment and / or prophylaxis of a neurodevelopmental or psychiatric disorder in a
human patient in need thereof, wherein said patient suffers from a neurodevelopmental or psychiatric disorder selected from the group comprising
attention deficit hyperactivity disorder (ADHD),
attention deficit disorder (ADD),
impulse control disorder and learning disorder and wherein said
iron supplementation is selected from the group comprising an intravenous
iron supplementation, parenteral
iron supplementation, oral iron supplementation, intraaerterial iron supplementation or intramuscular iron supplementation, preferably an intravenous iron supplementation.