When is Stuhlprobe Senioren actually useful?

The usefulness of a stool test in seniors depends entirely on the clinical context. The provided knowledge context focuses on genetic tests for food intolerances and sports performance, not on stool analysis. Medically, the fecal immunochemical test (FIT) is well-established for colorectal cancer screening starting at age 50, with strong guideline-based evidence. For seniors, FIT is useful when colonoscopy is not feasible or declined. In contrast, microbiome profiling from stool samples is not recommended as routine screening for healthy seniors; the evidence is mechanistic and inconsistent. Stool tests for parasites, inflammation (calprotectin), or blood have clear indications (e.g., diarrhea, suspected IBD). Importantly, many direct-to-consumer stool tests are marketed with exaggerated claims, and the provided context does not support their general use. The evidence level for FIT is 'practice' (established clinical practice), while for other stool tests it is 'unclear' or 'mechanistic'. Conclusion: A stool test in seniors is useful only when part of a physician-ordered screening (e.g., colorectal cancer) or diagnostic workup for specific symptoms. Without medical indication, the benefit is uncertain. Sources: none from the provided context; general guidelines apply.