Here are the particulars: The study, published in the Archives of Internal Medicine, identified a population of middle-aged women of normal weight and recorded their lifestyle habits as a baseline. Over the period of follow-up, some 42% became overweight and 4% obese, as determined by Body Mass Index. After statistically adjusting for factors such as exercise habits, smoking, and non-alcohol caloric intake, they found that moderate drinkers were much less likely to gain weight as compared to nondrinkers. The pattern was most dramatic for women who drank red wine.
We do know of course that people who drink red wine regularly and in moderation have other healthy habits, but a significant aspect of this study is that those factors were neutralized. There is clearly something more to the red wine connection than just being a marker for a better diet or regular exercise. This study doesn’t tell us what that might be, but we have some ideas, don’t we?