Magen-Darm-Gesundheit: what symptoms are typical?

Typical symptoms of poor gastrointestinal health include bloating, abdominal pain, diarrhea, constipation, heartburn, nausea, and a feeling of fullness. These can arise from various causes such as food intolerances (e.g., lactose intolerance), irritable bowel syndrome, inflammatory bowel disease, or functional disorders. Symptoms are often non-specific and may overlap. Genetic testing (e.g., for LCT or TCF7L2 variants) can identify risk factors but does not replace clinical diagnosis. The evidence for these symptoms is based on clinical practice and observational studies; individual variation is significant. Persistent or severe symptoms warrant medical evaluation. Note: DNA tests for gut health have limited predictive value and should not be the sole basis for dietary or lifestyle changes.