Well, I think it is difficult to kill brain cells with a drink of alcohol. But long term excessive alcohol consumption probably does have a detrimental effect on the brain.
Dr. Perlmutter mentions in his talk at the Buck Institute (video here) that alcohol is a neurotoxin. But a small amount like a glass of red wine is fine.
Dr. Meschino says in his article in MeschinoHealth.com …
“Alcohol kills brain cells. If you drink then have no more than 3 alcoholic drinks per week.”
and summary video …
But article in Medical Daily says no, but that …
“When alcohol reaches the brain, it disables function by damaging the connective tissue at the end of neurons. This disrupts communication among neurons and makes it harder for an individual to focus or complete minor tasks. However, our bodies are incredibly resilient and for the most part forgiving works of nature. This alcohol-induced cell rampage does minor damage and most definitely does not result in the cell’s death.”
nih.gov writes that …
“People who have been drinking large amounts of alcohol for long periods of time run the risk of developing serious and persistent changes in the brain. Damage may be a result of the direct effects of alcohol on the brain or may result indirectly, from a poor general health status or from severe liver disease.”