What should I know about eisenmangel selbsttest?

An iron deficiency self-test (typically a capillary blood test measuring ferritin, serum iron, or transferrin saturation) can provide an initial indication of possible iron deficiency. However, the reliability of such home tests is limited: home blood collection carries risks of hemolysis or contamination, and reference ranges vary between labs. Moreover, a low ferritin level can have many causes (inflammation, chronic disease, blood loss) that require medical evaluation. A positive self-test does not replace a doctor's diagnosis – especially before starting iron supplementation, a complete blood count with ferritin, CRP, and transferrin saturation should be determined by a physician, as overdosing can be harmful. Evidence for the accuracy of home tests is moderate; they can serve as a screening tool but not as the sole basis for treatment decisions.