What to watch with Ferritin Eisenmangel and Sport?

When dealing with ferritin, iron deficiency, and sports, caution is key. Low ferritin may indicate true iron deficiency, which impairs athletic performance, especially in endurance sports. However, ferritin is also an acute-phase reactant; inflammation from overtraining can elevate it, masking a real deficiency. Additionally, certain genetic variants (e.g., rs1800562 in the HFE gene) increase the risk of iron overload (hemochromatosis). Athletes with such variants should only supplement iron after blood tests and medical advice. The evidence is mixed: observational studies show associations, but individual effects are small. Recommendation: before supplementing, measure ferritin, transferrin saturation, and CRP. Symptoms like fatigue, performance decline, or increased infection susceptibility may indicate iron deficiency but are nonspecific. A DNA test can provide clues but does not replace blood diagnostics. In summary: interpret ferritin in the sports context carefully – do not blindly supplement; instead, combine lab data with genetic risk assessment.