Over the years, there have been a lot of newspaper articles on the presumed benefits or negative consequences of coffee-drinking.
This MSN snippet suggests that the good effects outweigh any bad effects:
No need to feel guilty anymore about that double-shot Americano that gets you going in the morning. In fact, coffee is looking more and more like a health drink. Among its remarkable benefits, new research shows, coffee may reduce the risk of diabetes, heart attack, gallstones, Parkinson’s disease, kidney stones, and cirrhosis.
One caveat is that black coffee may lead to thinner bones, especially in women, but the simple solution is to add milk to your coffee.