Can Eisen-Ferritin Selbsttest help with sleep?

The iron-ferritin self-test measures ferritin levels in the blood, which serve as a marker for the body's iron stores. Low ferritin is associated in the medical literature with Restless Legs Syndrome (RLS) and related sleep disturbances. RLS is a common cause of difficulty falling asleep and staying asleep, and iron deficiency treatment can alleviate symptoms. Therefore, the test may help identify iron deficiency as a contributing factor to sleep problems. However, the test is not a medical diagnostic device and does not replace a clinical evaluation. The evidence linking ferritin to sleep quality is primarily based on observational studies; randomized controlled trials using the self-test as an intervention are lacking. Moreover, many other factors (e.g., genetic predisposition, stress, caffeine intake) can affect sleep. An isolated ferritin value does not reflect the whole picture. Iron supplementation should only be taken after consulting a physician, as iron overload can also be harmful. The test should be considered a screening tool, not a standalone basis for therapeutic decisions.