What role does Eisen-Ferritin Selbsttest play in longevity?

The MyBody-X iron/ferritin self-test measures ferritin levels, reflecting body iron stores. Iron homeostasis is relevant to longevity because both deficiency (anemia, fatigue, impaired cognition) and excess (oxidative stress, inflammation, increased cardiovascular and neurodegenerative risk) can shorten healthspan. However, a single self-test has limited clinical utility: ferritin is an acute-phase reactant that can be falsely elevated by inflammation, infection, or liver disease. The test does not assess transferrin saturation or total iron-binding capacity, which are needed for a complete picture. MyBody-X markets this as a lifestyle test, not a diagnostic tool. For longevity purposes, a physician should interpret ferritin alongside other markers (e.g., CRP, hemoglobin, transferrin). The evidence for a direct longevity benefit from self-testing is weak; it is mechanistic at best. Caveat: Without medical guidance, users may misinterpret results, leading to unnecessary supplementation or missed diagnoses.