A new study shows that even “just one drink” affects your brain, even if you’re not aware of it. The recently-published study was performed by researchers at San Diego State University on 18 healthy social drinkers. Under one condition, the participants completed a computer-based task after drinking one drink, and under the other condition, they completed the same task after drinking orange juice that acted as a placebo for an alcoholic beverage, while their beta (movement control) and theta (decision-making) brain waves were measured. After just one drink, the decision-making brain waves of those who had had a drink decreased to about half the frequency of those who had ingested orange juice, though these effects were below the conscious level, meaning that the subjects “felt” fine. This study needs a bit more follow-up given the small number of participants, but it does suggest an inhibited driving capability after less alcohol than most people believe will affect them.

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