What should I know about laktoseintoleranz erkennen und selbsttesten?

What to know about recognizing and self-testing lactose intolerance: Self-tests (e.g., genetic test for LCT gene variants or elimination diet) can provide clues but are not diagnostic. The gold standard is a hydrogen breath test after lactose ingestion, performed under medical supervision. Genetic tests indicate predisposition, not current lactase deficiency – many with risk variants remain asymptomatic. Self-testing without professional guidance risks misinterpretation, leading to unnecessary dietary restrictions or missed underlying conditions (e.g., IBS, celiac disease). Evidence: practice (breath test validated), genetic tests have moderate predictive value. Caution: persistent symptoms warrant a doctor’s evaluation.