Low to moderate consumption of red wine (1-4 six-ounce glasses per week) may have some positive effects.

“So, for instance, there have been studies of low to moderate red wine consumption. This would be anywhere from one to four glasses per week. And I don't mean enormous glasses, I mean six-ounce glasses of red wine. And in those cases, some of the stress reduction that can be induced by consumption of red wine, maybe some of the other micronutrients and components within red wines, in particular red wines that come from particular grapes, and this gets really nuanced and, frankly, is not well worked out in the peer-reviewed literature or certainly not clinical trials, at least not that I'm aware of.”