Carriers of the ALDH2*2 allele, and homozygotes in particular, have impaired alcohol metabolism. If they drink alcohol, acetaldehyde accumulates, leading to the emergence of flushing, headache, sweating, tachycardia, nausea, and vomiting, all of which serve to protect against the development of an alcohol use disorders. 双隐形ALDH基因人群的乙醇代谢受损,饮酒后乙醛积累,导致脸红头痛出汗心动过速恶心呕吐。 但是,注意了,正因为这些人的乙醇代谢受损,酒精不耐受,使他们得酒精所致精神障碍的概率降低。