Evidence check: Eisen-Ferritin Selbsttest in the context of Langlebigkeit

The iron-ferritin self-test measures stored iron (ferritin) via capillary blood. Ferritin is a well-established clinical marker for iron status – both deficiency and overload have health implications. In the longevity context, iron is a double-edged sword: chronically elevated ferritin (iron overload) promotes oxidative stress and is linked to accelerated aging, cardiovascular disease, and neurodegeneration (e.g., hemochromatosis). A balanced iron status appears favorable. However, evidence that self-testing ferritin directly extends lifespan is weak: no randomized trials show that home monitoring improves longevity outcomes. Self-test accuracy is acceptable but inferior to venous lab testing. Moreover, lay interpretation is error-prone – a low-normal ferritin can be masked by inflammation. Conclusion: Ferritin is a relevant biomarker, but the self-test alone does not guarantee longevity. Without medical context (e.g., transferrin saturation, CRP), it can mislead. Evidence level: human-moderate for ferritin as biomarker, but marketing-leaning if direct longevity claims are made.