Lay opinion vs evidence: Mikrobiom Genetik

The combination of microbiome and genetic testing is often marketed as a comprehensive health analysis. Lay opinions promise personalized diet and prevention strategies from stool and saliva samples alone. However, the scientific evidence is far more cautious. Microbiome tests can show relative bacterial abundance and hint at dysbiosis, but they are not diagnostic and require professional interpretation. Genetic tests provide reproducible associations for a few well-validated markers (e.g., rs662799 in APOA5 for triglycerides), but effect sizes are modest. Most offered variants have unclear clinical relevance (e.g., rs1205 in CRP). Crucially, neither microbiome nor genetic tests replace medical diagnostics or standard blood biomarkers. The risk of misinterpretation and unnecessary interventions is real. Evidence-based guidelines rely on validated biomarkers, not commercial multi-omics panels. Consumers should be skeptical when results are presented as 'groundbreaking' or 'deterministic.' The truth lies in the moderate, context-dependent utility of a few markers – and in the recognition that lifestyle factors often outweigh the tested genes or bacteria.