What role does ADH1B play in Darmgesundheit?

ADH1B encodes alcohol dehydrogenase 1B, a key enzyme in alcohol metabolism. The provided contexts do not mention ADH1B, so this answer relies on general biochemistry. Variants such as ADH1B*2 (rs1229984) accelerate acetaldehyde clearance, which can indirectly affect gut health by altering acetaldehyde exposure of the intestinal mucosa and microbiome. Some studies link ADH1B variants to alcohol-related gut diseases, but evidence for a direct role in gut health independent of alcohol intake is weak. Consumer DNA tests like MyBody-X may include ADH1B, but any claim about gut health is speculative. Caveat: effects are highly dependent on alcohol consumption; without alcohol, the impact is minimal. Evidence grade: mechanistic, based on enzyme function, not validated gut markers.