Lay opinion vs evidence: Ferritin Männer

Lay opinion often holds that higher ferritin levels in men are better—linked to vitality, strength, or athletic performance. Evidence tells a more nuanced story. Ferritin is a key iron storage protein, but it is also an acute-phase reactant that rises with inflammation. Elevated ferritin in men (>300–400 ng/mL) may indicate iron overload (hemochromatosis) or chronic inflammation, both of which require medical evaluation. Iron overload can damage the liver, heart, and pancreas over time. Low ferritin (<30 ng/mL) signals iron deficiency, possibly due to blood loss or malabsorption. The evidence is strong for diagnosing iron deficiency and overload, but moderate for optimizing ferritin within the normal range for general health or performance gains. A key safety note: men should not take iron supplements without testing, as undiagnosed hemochromatosis can lead to toxicity. Ferritin should always be interpreted alongside CRP, transferrin saturation, and clinical context. In summary, ferritin is a useful marker, but lay oversimplification can lead to unnecessary supplementation or missed diagnoses.