Ferritin heavy chain(FTH1, ferritin, heavy polypeptide 1), as a 21 kDa subunit of the ferritin complex, exhibits ferroxidase activity, which serves an essential role in catalyzing the conversion of the ferrous ions (Fe2+) to the ferric form (Fe3+). FTH1 regulates angiogenesis during inflammation and malignancy by binding to high molecular weight kininogen (HK) and blocking its anti-angiogenic activity on endothelial cells in vitro and in vivo. FTH1 has been shown to protect proximal tube epithelial cells and kidneys against the activity of free iron in reactive oxygen species generation. FTH1 plays an important role in the maintenance of the cellular iron balance in ferroptosis.