Molybdenum is another essential metallic element with various valence states (+3, +4, +5, +6) for the human body and acts as a cofactor for several oxidoreductases such as sulfite oxidase (SUOX), aldehyde oxidase (AOX), and mitochondrial amidoxime‐reducing component (mARC).[207] In ovarian cancer cells treated with sodium molybdate, an increase in labile iron pools and depletion of GSH were observed, which was mediated by MoO42− activating these enzymes to catalyze the production of NO2− to generate NO[208]. Here, SUOX is linked to ovarian cancer.