👉 Catalase is a protein that plays an important role in the metabolism of iron. It is found in the liver, spleen, and bone marrow. The primary function of catalase is to break down iron into ferric ions, which are then transported through the blood to other parts of the body for use as an antioxidant. In humans, catalases play a crucial role in the detoxification of iron from the body, helping to prevent its accumulation in tissues and organs that can cause damage or