Alcohol causes cancer and other problems. But is complete abstinence better than drinking small amounts of alcohol (like red wine)? Do potential heart and social benefits outweigh other drawbacks? "He thinks that the studies which suggest that moderate drinking is protective are flawed. He says the problem is that people who don't drink at all tend to include former alcoholics and people who are in poor health, and that skews the apparent benefits of moderate drinking." Others disagree.