Scientists saw detectable changes in the brains of people who had one or two drinks each day, calling into question current national guidelines on safe alcohol consumption.
But could even this modest amount of alcohol make a difference to our brains?brain scans from 36,678 healthy adults, ages 40 to 69, in the U.K. and compared those findings to their weekly alcohol consumption, adjusting for differences in age, sex, height, social and economic status, and country of residence, among other things.
Going from one unit of alcohol to two -- which in the U.K. means a full pint of beer or standard glass of wine -- was linked to changes similar to 2 years of aging in the brain. The study also has several drawbacks. The people who were studied are all middle-aged Europeans, so findings might be different in younger people or those with different ancestries. People also self-reported how much alcohol they drank for the past year, which they might not remember correctly or which might be different from previous years, including past years of heavy drinking.
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