Myths vs facts: ADH1B and blood sugar

Claims that ADH1B (alcohol dehydrogenase) directly affects blood sugar are largely myths. Fact: ADH1B variants (e.g., rs1229984) primarily alter alcohol metabolism rate. Some observational studies and GWAS have reported weak associations with fasting glucose or type 2 diabetes risk, but effect sizes are small and confounded by alcohol intake, diet, and lifestyle. The evidence is mechanistic or observational at best – no randomized controlled trials support a causal role. Consumer DNA tests often overstate such links. Blood sugar regulation is multifactorial; ADH1B genotype is not a clinically actionable marker. Do not change diet or supplements based on this SNP alone.