GPX4 and colorectal cancer: As a consequence of this action, the glutathione peroxidase 4 (GPX4) was inactivated, causing an increase in intracellular lipid peroxidation.[100] Specifically, poly‐pyridine (PPy) nanoparticles combined with magnetite (Fe3O4) demonstrated the capacity to diminish the growth, migration, and invasion of colorectal cancer (CRC) cells by promoting ferroptosis.