SLC6A6 and neoplasm: We found that RSL3 treatment in a combination with knock‐out of TauT showed the most beneficial ferroptosis‐mediated tumor killing effects, evidenced by low tumor weights, a downregulation of Ki67 expression (Figure S4I,J, Supporting Information), an upregulation of cell death (Figure S4K, Supporting Information) and the strong staining of 4‐HNE in related tissue samples (Figure S4L, Supporting Information).