How are Eisen-Ferritin Selbsttest and Sport related?

The iron-ferritin self-test measures ferritin concentration in the blood, a protein reflecting the body's iron stores. For athletes, especially endurance athletes, iron is crucial: it is a component of hemoglobin and essential for oxygen transport and mitochondrial energy production. Low ferritin levels can indicate iron deficiency, leading to fatigue, reduced performance, and increased injury risk. Studies suggest that up to 30% of endurance athletes have subclinical iron deficiency. The self-test can help detect deficits early, allowing dietary adjustments or supplementation. However, interpretation is not straightforward: ferritin is an acute-phase protein that can be elevated during inflammation, masking true iron status. Reference ranges also vary by lab and sport type. A self-test does not replace medical diagnosis, especially if values are abnormal or symptoms present. The evidence for such tests in sports is based on mechanistic links and clinical practice, not large randomized trials. Athletes should use the test as a screening tool and consult a physician if needed.