wie lange dauert ein gentest — can a DNA test help?

A consumer DNA test (e.g., MyBody-X) typically takes 2–4 weeks after the lab receives your sample. The duration varies by test type: DNA (saliva) requires extraction, genotyping, and analysis, while blood tests (e.g., IgE) may be faster. Whether a DNA test can help depends on the question. For ancestry or certain well-established genetic variants (e.g., lactose intolerance), it can provide useful information. However, for complex traits like diet response or skin aging, evidence is weak. The DIETFITS trial (JAMA 2018) found no benefit from DNA-matched diets. Consumer tests are not medical devices – they cannot diagnose or replace a doctor. In Germany, the Genetic Diagnostics Act (GenDG) requires physician involvement for health-related genetic claims. A DNA test can help if you have realistic expectations and treat results as guidance, not certainty.