What to watch with Eisen-Ferritin Selbsttest and fatigue?

An iron-ferritin self-test measures ferritin, a marker of iron stores. While low ferritin can contribute to fatigue, tiredness has many causes (e.g., sleep deprivation, stress, thyroid issues, vitamin D deficiency). The test gives only one piece of the puzzle. Without medical guidance, self-diagnosis may lead to unnecessary or incorrect supplementation – especially if ferritin is high (risk of hemochromatosis). Home test accuracy varies; reference ranges are not standardized. Also, inflammation can elevate ferritin, masking true iron deficiency. Evidence: mechanistic; no strong clinical validation for self-tests. Caution: persistent fatigue warrants a full workup (CBC, CRP, transferrin, ferritin) by a physician.