What to watch with Ferritin and longevity?

Ferritin is the body's primary iron storage protein. For longevity, maintaining an optimal ferritin level is important because both low and high values carry health risks. Chronically elevated ferritin may indicate iron overload (hemochromatosis) or an inflammatory response—both promote oxidative stress and are associated with reduced lifespan. Conversely, iron deficiency leads to anemia and impaired oxygen delivery, which can also negatively affect longevity. However, the evidence for a direct ferritin–longevity link comes mostly from observational studies; there are no strong interventional trials showing that optimizing ferritin extends lifespan. Additionally, ferritin is an acute-phase reactant, meaning it rises with inflammation—a high level may reflect chronic disease rather than true iron overload. Caution is warranted: iron supplements should only be taken when deficiency is confirmed, as excess iron is pro-oxidative. A reasonable individual target range (e.g., 30–150 ng/mL) can be considered, but ferritin should not be used as a standalone longevity marker. In summary, monitor ferritin but always interpret it together with inflammatory markers and full iron status.