HAO1 and cancer: synthesized cancer cell membrane‐coated metal‐organic framework for the facile incorporation of GoX, Fe3+ ions, and doxorubicin for tumor‐targeted triplet ferroptosis/chemotherapy/immunotherapy.[138] The released GoX could catalyze the oxidation of glucose to produce abundant H2O2, while the Fe3+ would react with the intracellular GSH and reduced to Fe2+, which would not only break down the antioxidative defense in tumor cells but also confer greater reactivity of the Fenton system for ferroptosis initiation.