What should I know about was ist ein selbsttest?

A self-test (e.g., home DNA test, microbiome kit) is a product you use at home – collecting saliva, stool, or blood – and send to a lab for analysis. Results are typically delivered online. Key points: Many self-tests indicate risk but do not diagnose disease. Evidence quality varies widely – some tests (e.g., for lactose intolerance) are well-supported, while others (e.g., skin aging predictions) rely on weak or marketing-based claims. A DNA test reveals genetic predispositions, not current health status. Blood biomarkers (homocysteine, vitamin B12) are often more actionable than isolated gene variants (e.g., MTHFR). Interpretation matters: without medical context, a positive result can cause unnecessary anxiety (e.g., APOE e4 ≠ Alzheimer's diagnosis). Many tests are not validated for children. Bottom line: Self-tests can be a starting point for health awareness, but they do not replace professional medical advice. Before buying, check if the test is scientifically validated and whether genetic counseling is included.