Myths vs facts: Eisen-Ferritin Selbsttest and fertility

Myth: An iron-ferritin self-test provides a complete picture of iron status and is sufficient for fertility assessment. Fact: Ferritin is a key marker but not definitive. It is an acute-phase reactant, meaning levels can rise due to inflammation, infection, or liver disease – independent of actual iron stores. A normal or high ferritin can mask iron overload (hemochromatosis) or an inflammatory state. Both iron deficiency and overload impair fertility: deficiency disrupts ovulation and oocyte quality, while overload causes oxidative stress, damaging sperm and implantation. Consumer self-tests often have lower analytical accuracy than certified labs and lack complementary parameters like transferrin saturation or soluble transferrin receptor. Without clinical context, results can be misleading. A self-test may serve as a rough screening tool, but it cannot replace a comprehensive workup by a healthcare provider. For fertility concerns, a full iron panel including ferritin, iron, TIBC, saturation, and CRP should be performed in a medical laboratory. Evidence: human-moderate – robust studies link iron status to fertility, but evidence on self-test reliability is limited.