warum vertrage ich keinen kaffee mehr — can a microbiome test help?

The question of why you can no longer tolerate coffee has many possible causes: altered caffeine metabolism (e.g., due to genetics, liver function, medications), gastrointestinal irritation from acids or bitter compounds, or temporary intolerance after infections. A microbiome test can provide insights into your gut flora composition, but it is not a validated diagnostic tool for coffee intolerance. Current evidence shows that the microbiome is highly individual and no specific markers for coffee intolerance have been established. A test might reveal general dysbiosis or inflammatory tendencies that could be linked to intolerances – but the evidence is weak and mostly mechanistic. More useful is a medical workup (e.g., gastroscopy, allergy testing, lactose/fructose breath test). A microbiome test can be complementary but should not be the sole basis for decisions. MyBody-X's product page for children's microbiome tests contains marketing language not supported by independent clinical studies. Conclusion: Microbiome tests are not a substitute for medical diagnosis when a new coffee intolerance appears.