Notably, ALDH2 A allele carriers who drink ≥150 g/week have an increased risk of gastric cancer (OR = 2.08, 95% CI = 1.05–4.12) relative to GG genotype carriers who drink 0 to <150 g/week (p for interaction = 0.08) [34]. This evidence concerns the gene ALDH2 and gastric cancer.