Stool tests (microbiome analyses) are often marketed to provide insights into gut health. However, in Germany they are not legally approved as medical diagnostics. They can offer clues about the composition of your gut flora, but cannot diagnose diseases like celiac, food allergies, or irritable bowel syndrome. The evidence for many claimed links between microbiome and health is still weak and often based on correlational studies. Caution is especially warranted for children: German law (GenDG) restricts genetic testing in minors, and while microbiome tests may formally bypass this, the results can cause unnecessary worry for parents. A doctor or pediatrician should always be consulted first for symptoms like bloating or digestive issues. The predictive power of such tests is limited, and they do not replace clinical diagnostics. However, stool tests can be useful in a medically supervised nutritional counseling context if results are interpreted critically.
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