Introduction: Alcohol dehydrogenase (ADH) is an enzyme discovered in the mid-1960s in Drosophila melanogaster. Since then, there has been extensive research on the enzyme. Alcohol dehydrogenase is a dimer, weighing 80 kDa. Alcohol dehydrogenases are a group of seven dehydrogenase enzymes that occur in many organisms and facilitate the interconversion between alcohols and aldehydes or ketones with the reduction of NAD+ to NADH. In humans and many other animals, they serve to break down alcohols w