In an article from this month's Wine Spectator, a study that came out from the BMC Public Health, says that light or moderate drinking of wine was not associated with being overweight or obese. According to the report, nondrinkers (those who consumed one or two drinks a day) were 54 percent and 41 percent, respectively, less likely to be obese. Furthermore the study showed that people who purchased wine often purchased less harmful foods, whereas beer drinkers purchased quick meals, highly processed foods.
Again though its studies like these that are often self selecting. Meaning wine drinkers are already health conscious relative to the general population. That said its good to see further confirmation that drinking wine, in moderation, can be (and should be) part of a healthy diet.