What role does COMT play in gut health?

COMT (catechol-O-methyltransferase) is primarily known for breaking down catecholamines (dopamine, adrenaline, noradrenaline) and estrogens. In the gut, it may indirectly influence motility, blood flow, and immune signaling via catecholamine regulation. Altered COMT activity could theoretically affect the gut-brain axis and inflammatory responses. However, direct evidence for a clinically meaningful role of COMT in gut health is limited. Most research focuses on neurological or psychiatric outcomes. Some studies have explored COMT polymorphisms in irritable bowel syndrome (IBS) or inflammatory bowel disease (IBD), but findings are inconsistent and not actionable. Consumer DNA tests often overstate the relevance of COMT variants for gut health. For improving gut health, established biomarkers (e.g., fecal calprotectin, microbiome profiling) and medical evaluation are far more reliable. Evidence: mechanistic/unclear.