title: FDA warning on unapproved performance enhancer.
mesh_terms: D019587:Dietary Supplements; D017277:Drug Approval; D005867:Gestrinone / Q000008:administration & dosage* / Q000031:analogs & derivatives; D006801:Humans; D040541:Marketing; D010807:Physical Endurance / Q000187:drug effects*
chemical_list: D005867:Gestrinone; C479553:tetrahydrogestrinone