Is ADH1B useful for Darmgesundheit?

ADH1B encodes alcohol dehydrogenase, which metabolizes ethanol to acetaldehyde. Certain variants (e.g., rs1229984) cause faster acetaldehyde accumulation, associated with lower alcohol intake. For gut health, ADH1B is only indirectly relevant: excessive alcohol damages the gut lining and promotes dysbiosis. Genetically reduced alcohol consumption may therefore be protective. However, there is no robust evidence that ADH1B variants directly impact gut health independent of alcohol intake. Gut microbiota, diet, and lifestyle are far more influential. Consumer DNA tests like MyBody-X can analyze ADH1B, but the clinical utility for gut health is low. The evidence is limited to mechanistic links and observational studies on alcohol metabolism. Interpreting ADH1B in isolation without considering alcohol consumption is misleading.