was tun bei eisenmangel — when to see a doctor?

Iron deficiency is a common lab finding, but not every low ferritin requires immediate medical attention. See a doctor if you experience persistent fatigue, pale skin, shortness of breath, brittle nails, or concentration problems lasting more than two weeks. Also seek evaluation if you have known blood loss (heavy menstruation, GI bleeding) or follow a vegetarian/vegan diet without targeted iron intake. A physician can assess via CBC, ferritin, transferrin saturation, and inflammatory markers to determine the cause. Important: Self-supplementing iron without a diagnosis can be dangerous – iron overload (hemochromatosis) damages liver and heart. MyBody-X tests like the Gut Health test do not measure iron and cannot replace clinical workup. Always consult a doctor during pregnancy, for children, or with chronic conditions. Evidence: Standard medical practice based on guidelines (e.g., DEGAM). No specific studies from the provided context.