What do studies say about Stuhlprobe Basis?

The 'Stool Test Basic' typically refers to a microbiome analysis of gut bacteria. Studies indicate that while such tests can provide interesting insights into bacterial composition, they are not yet sufficiently validated as medical diagnostic tools. The evidence is largely mechanistic: associations between certain bacteria and health outcomes are known, but individual predictive power is low. An example from genetics is the FUT2 variant rs601338, associated with Bifidobacterium abundance, yet its clinical significance is classified as 'benign'. Direct-to-consumer (DTC) tests often lack professional oversight, and results can be confounded by diet, medications, and sample handling. SIBO breath tests (literature: PMID 40731137, 26636484, 19643023) show similar limitations: false positives/negatives, lack of standardization. For the basic stool test, no universal cut-offs or reference ranges exist. Conclusion: These tests may serve as screening tools but do not replace clinical diagnosis. The evidence is currently rated as 'unclear'.