近期一项发表于《自然·通讯》的研究指出，即使是适量饮酒，也可能导致大脑体积缩小。研究团队分析了超过3.6万名成年人的脑部MRI数据与饮酒习惯，发现酒精摄入量与脑容量之间存在负相关关系——即使每天仅饮用1-2单位酒精（约等于一小杯葡萄酒或一罐啤酒），大脑灰质和白质的体积也会出现轻微但显著的减少。值得注意的是，这种影响并非线性，而是随着饮酒量增加而加剧。研究还排除了年龄、性别、吸烟、教育水平等潜在混杂因素，进一步支持了酒精本身对大脑结构的负面影响。虽然目前尚不能完全确定因果关系，但结果提示：所谓“适量饮酒有益健康”的传统观念可能需要重新审视。专家建议，若希望保护大脑健康，最安全的饮酒量或许是零。这项研究为公众健康政策提供了新的科学依据，也提醒人们在日常生活中应更加谨慎对待酒精摄入。
A recent study published in Nature Communications suggests that even moderate alcohol consumption may lead to reduced brain volume. Researchers analyzed brain MRI data and drinking habits from over 36,000 adults and found a negative association between alcohol intake and brain size—even consuming just 1–2 units of alcohol per day (roughly equivalent to a small glass of wine or a can of beer) was linked to subtle but significant reductions in both gray and white matter volume.Importantly, the effect was not linear; brain shrinkage intensified as alcohol consumption increased. The study controlled for potential confounding factors such as age, sex, smoking, and education level, strengthening the evidence that alcohol itself negatively affects brain structure. While causality cannot yet be definitively established, the findings challenge the long-held belief that moderate drinking is beneficial to health.Experts now suggest that, for optimal brain health, the safest amount of alcohol may be none at all. This research provides new scientific support for public health guidelines and serves as a reminder to approach alcohol consumption with greater caution in daily life.
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