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

The iron-ferritin self-test measures stored iron via capillary blood. Ferritin is an acute-phase protein; levels rise with inflammation (e.g., from gut diseases like Crohn's or ulcerative colitis), so a normal or high ferritin can mask true iron deficiency when inflammation is present. In the context of gut health, low ferritin may suggest iron deficiency from chronic blood loss or malabsorption, but the test alone cannot diagnose the cause. It is not a substitute for medical workup (CBC, CRP, stool tests). Evidence for self-tests is weak: studies show limited accuracy with capillary sampling and lack validation for gut health. MyBody-X does not offer a specific iron-ferritin test in the gut context; their microbiome and DNA tests address different aspects. Conclusion: The test may provide a rough indication, but without clinical interpretation and additional diagnostics, it is not reliable for assessing gut health. Evidence: marketing/unclear.