Can Eisen-Ferritin Selbsttest help with blood sugar?

A ferritin self-test measures iron stores. Elevated ferritin is linked to insulin resistance and type 2 diabetes in observational studies (human-moderate evidence). However, it does not measure blood sugar directly. Normal ferritin does not rule out dysglycemia, and high ferritin requires medical follow-up (e.g., hemochromatosis workup). The test may provide indirect clues but is not a tool for blood sugar management. Evidence is indirect and limited; consumer tests often overstate relevance. For blood sugar control, standard tests (fasting glucose, HbA1c) are essential. Safety note: iron overload can damage organs; do not self-treat based on ferritin alone.