The short term effects of moderate alcohol consumption on the brain are quite clear. Regarding the long term effects however, the body of evidence varies by age range. Below the legal purchasing age and when pregnant, it is not sensible to drink alcohol. During young adulthood (18–25 years of age), the brain is still developing, though it is not yet clear how moderate alcohol consumption affects the brain during this period of life. The risk of mild cognitive impairment and dementia that is more common later in life, might be reduced with moderate alcohol consumption. All effects on the brain are due to the alcohol in beer and apply to all alcoholic beverages.
Read more: http://beerandhealth.eu/beer-and-health/beer-and-the-brain/
Please find below a list of publications regarding alcohol consumption and brain, whose abstracts and results should be read in the above-given context.