Heavy use of alcohol among adolescents and young adults is not only dangerous in its own right, but new research in nonhuman primates shows that it can actually slow the rate of growth in developing brains. The study, published today in the journal eNeuro, shows that heavy alcohol use reduced the rate of brain growth by 0.25 milliliters per year for every gram of alcohol consumed per kilogram of body weight. In human terms, that’s the equivalent of four beers per day. Chronic alcohol self-intoxication reduced the growth rate of brain, cerebral white matter and subcortical thalamus
— source news.ohsu.edu | Apr 1, 2019