What to watch with ADH1B and Sport?

The ADH1B gene variant (especially rs1229984, known as ADH1B*2) affects alcohol metabolism: carriers of the fast variant break down alcohol much more quickly, leading to a buildup of acetaldehyde. This causes flushing, nausea, and discomfort after drinking – a natural deterrent to excessive alcohol intake. For sports, ADH1B is not a direct performance gene. Alcohol is known to impair recovery, muscle protein synthesis, and coordination. Carriers of the fast variant tolerate alcohol poorly, which may indirectly benefit athletic performance by discouraging consumption. There is no robust evidence that ADH1B influences exercise capacity or training response independently of alcohol behavior. Evidence comes from GWAS and pharmacokinetic studies. Caveat: Do not overinterpret this single SNP – lifestyle and training are far more important. If alcohol is consumed regularly, monitoring liver enzymes (e.g., GGT) via blood test may be advisable.