Twelve patients with PSP–Richardson's syndrome (PSP–RS), 12 with PSP‐Parkinsonism Predominant (PSP‐P), and 12 controls were examined using Unified Parkinson's Disease Rating Scale—III part (UPDRS‐III) in OFF stage and analyzed in the context of hepcidin levels in the serum. Here, HAMP is linked to Classical progressive supranuclear palsy.