What to watch with Ferritin Eisenmangel and fatigue?

When monitoring ferritin iron deficiency and fatigue, consider not only ferritin but also complete blood count (hemoglobin, MCV, MCH), transferrin saturation, and CRP to rule out anemia and inflammation. Fatigue can occur with low ferritin even without anemia. Evidence is from clinical practice and observational studies. Caveat: ferritin is an acute-phase reactant; it may be falsely elevated during inflammation. The provided context does not contain specific information on ferritin or iron deficiency. Genetic testing (e.g., HFE mutations) is only indicated if hereditary hemochromatosis is suspected, not for general iron deficiency workup.