What to watch with Stuhlprobe and Langlebigkeit?

When using stool tests in the context of longevity, maintain a critical perspective. MyBody-X offers food intolerance (IgG) and microbiome tests. IgG tests lack evidence – they measure antibodies that are not validated for intolerances and often yield false positives. Microbiome tests can show levels of Bifidobacteria and Lactobacilli, but they cannot diagnose the cause of symptoms. A human-observational study (PMID:39641896) found that SIBO (small intestinal bacterial overgrowth) can suppress duodenal lactase activity; treating SIBO with rifaximin restored lactose digestion. This suggests a mechanism linking gut health to nutrient absorption and potentially long-term health. For longevity, a diverse microbiome with anti-inflammatory bacteria like Faecalibacterium prausnitzii is considered beneficial, but direct evidence from stool tests predicting lifespan is lacking. Be aware that these tests are not medical diagnostics. Combine results with lifestyle factors (diet, exercise, stress). Evidence level: human-moderate – some human data exist, but causality is not firmly established.