Everything I have read says that the claim, that moderate alcohol consumption has health benefits, is totally debunked. In fact, study after study, including those of the WHO, show that there is no level of alcohol consumption that does not have the risks associated with alcohol consumption, such as increased risk of cancer, liver disease, and, totally contrary to the claims to the opposite, cardiovascular disease.
Studies that claimed that the health of the French show that moderate alcohol consumption is beneficial were flawed, and the low rate of heart disease in the French is due to other factors.
At least one study I saw found that the studies which claimed health benefits of wine were sponsored by the wine industry. Sound familiar to the studies sponsored by RJ Reynolds, back in the late 20th century?