wie wird eiweiß verdaut — can a microbiome test help?

Protein digestion starts in the stomach with pepsin and continues in the small intestine via pancreatic enzymes (trypsin, chymotrypsin). The resulting amino acids and small peptides are absorbed through the gut wall. The microbiome plays an indirect role: undigested protein reaches the colon, where bacteria ferment it, producing short-chain fatty acids and potentially harmful metabolites like ammonia or p-cresol. A microbiome test can reveal the composition of gut bacteria, but it does not directly measure protein digestion efficiency. It may indicate dysbiosis associated with altered protein fermentation, e.g., an overgrowth of proteolytic bacteria. However, evidence for the clinical utility of such tests in assessing protein digestion is weak. Individual enzyme activity, stomach acid production, and transit time are far more important. Therefore, a microbiome test is not a substitute for medical evaluation of digestive issues. Its predictive value is limited, and many factors (diet, medications, age) influence the microbiome more than protein digestion alone.