What do studies say about Stuhlprobe Ernährung?

The question of what studies say about stool sample nutrition („Stuhlprobe Ernährung“) is timely but not yet settled. Stool samples are primarily used to analyze the gut microbiome – the community of bacteria in the intestines. Research shows that microbiome composition correlates with diet and can change with dietary interventions. However, the evidence for personalized nutrition recommendations based solely on a stool sample is weak. Most commercial tests rely on associations rather than causal links, and effect sizes are small and highly individual. Some studies (e.g., on GLP-1 response or fiber preferences) show promising signals, but no robust clinical validation exists. Major nutrition societies (e.g., DGE, ASN) do not currently recommend routine microbiome testing for dietary advice. Caution is warranted: many providers overstate the predictive power. A responsible approach integrates stool data with blood biomarkers, food diaries, and lifestyle factors. In summary, stool samples can offer hints but cannot replace evidence-based dietary guidance. The evidence is mostly mechanistic or observational, not from randomized controlled trials with hard outcomes.