Ferritin is a protein that helps your body store and release iron. It is found in your body's cells, particularly in your liver, spleen, and bone marrow. Ferritin plays a critical role in maintaining healthy iron levels in your body, as iron is an essential nutrient that is needed for many important bodily functions, such as producing red blood cells and carrying oxygen throughout your body.

When iron levels in your body are high, ferritin binds to the excess iron and stores it in your cells. When iron levels are low, ferritin releases iron into your bloodstream to be used by your body. Ferritin levels in your blood are often used as an indicator of your body's iron stores.

Low ferritin levels can be a sign of iron deficiency, which is a common type of anaemia that can lead to fatigue, weakness, and other health problems. High ferritin levels can indicate an iron overload or other medical conditions, such as liver disease and inflammation.

If your ferritin levels are abnormal, your doctor may recommend further testing to determine the underlying cause and develop a treatment plan. Treatment for low ferritin levels typically involves iron supplements and changes to your diet to include more iron-rich foods. Treatment for high ferritin levels depends on the underlying cause and may involve medications, dietary changes, or other interventions.