GPX4 and osteoporosis: In osteoporosis caused by corticosteroids, ferroptosis‐associated proteins, prostaglandin‐endoperoxide synthase 2 (PTGS2), and Acyl‐CoA synthetase long‐chain family member 4 (ACSL4) levels were upregulated, while glutathione peroxidase 4 (GPX4) levels were decreased.