Evidence check: Ferritin in the context of longevity

Ferritin is an iron-storage protein and a key biomarker in the context of longevity. Moderate ferritin levels (roughly 30–80 ng/mL) are often considered favorable, as iron overload promotes oxidative stress and is linked to aging-related processes such as inflammation, insulin resistance, and cardiovascular disease. Epidemiological data suggest a U-shaped relationship: both very low and very high ferritin are associated with increased all-cause mortality. However, the evidence is largely observational; randomized controlled trials specifically targeting ferritin reduction as a longevity intervention are lacking. Furthermore, ferritin is an acute-phase reactant – elevated levels may reflect inflammation or infection rather than true iron overload. For consumers, a single ferritin reading without context (e.g., CRP, transferrin saturation) has limited interpretability. MyBody-X currently does not offer a ferritin test; this is a blood biomarker, not a DNA trait. Anyone aiming to optimize iron status for longevity should rely on physician-supervised lab work, not genetic tests. Caution is warranted: indiscriminate iron supplementation when ferritin is already high can be harmful.