No, brain cells -- like nerve cells -- don't regenerate. A newborn baby has all the brain cells it'll ever have. That's why brain injuries are so serious.
Who'd think I'd remember so much from AP Biology so many years ago? Doctors and other health professionals promote moderate drinking not as a healthy choice, but as better choice than binge drinking or heavy drinking. Moderate drinking is promoted with the assumption that people are going to drink because it's a social habit that's very ingrained, so moderation is the way to approach it.
You're not going to find a doctor who'll say, "Oh, you don't drink at all? You really should start."
First, not true, we grow new neurons.
Second, ok, AGAIN, as you can see in the article I quoted - the CDC promote moderate drinking not just as a healthy choice but as one of the four lifestyle choices you can make to live longer.
They ARE promoting it as a healthy choice - exercise, healthful eating, not smoking and moderate drinking are the four things they RECOMMEND.