Ferritin is a protein that stores and releases iron in the body. It plays a crucial role in maintaining iron homeostasis, ensuring that there is enough iron available for essential functions, such as the production of red blood cells. Ferritin can be found in various tissues, including the liver, spleen, and bone marrow. The amount of ferritin in the blood can indicate a person's iron levels. Low ferritin levels may suggest iron deficiency, which can lead to anemia, while high levels may indicate excess iron or inflammation. Monitoring ferritin is important for diagnosing and managing various health conditions related to iron metabolism.