Ferritin is the body's iron storage protein produced by the liver. It is more than just a static iron warehouse, though. It's a dynamic iron buffer that responds to changes in the body. That helps keep you alive, but makes the diagnosis of high ferritin very frustrating! Low ferritin is specific for iron deficiency, but high iron can be many things, including iron overload, infections, inflammation, and cancer! The stepwise evaluation of high ferritin includes transferrin saturation and other...