Myths vs facts: ADH1B and sleep

The claim that ADH1B directly determines sleep quality is a myth. ADH1B encodes alcohol dehydrogenase, which metabolizes ethanol. Variants like rs1229984 (ADH1B*2) increase the rate of ethanol-to-acetaldehyde conversion, causing flushing and discomfort. This can indirectly affect sleep if alcohol is consumed: faster metabolism may reduce alcohol's sedative effects or disrupt sleep via acetaldehyde. However, without alcohol intake, ADH1B has no known direct impact on sleep architecture or duration. Evidence is mechanistic (metabolic pathway) and insufficient for clinical sleep recommendations. Consumers should understand that ADH1B genetic tests do not predict sleep problems unless alcohol is involved. Healthy sleep depends primarily on lifestyle, stress, and sleep hygiene.