"Alcohol bombards your genes. With enough alcohol, eventually, some damage isn't fixed," he explains. "That's why excessive alcohol use is a factor in head and neck cancer. Now, resveratrol challenges these cells—the ones with unrepaired DNA damage are killed, so they can't go on to cause cancer."
More From Rodale News: Alcohol's Benefits Are Erased by Extra Drinking
David Zulberg, author of The 5 Skinny Habits, also points out that wine has plenty of other benefits, in addition to helping to prevent cancer. "Wine has five terrific benefits that stand out when it is consumed correctly: heart health, disease prevention, fewer colds, weight loss, and mood and brain enhancement," he says.
So what is "correct" consumption? Though the definition of moderate drinking is two drinks for men and one drink for women, Zulberg recommends keeping it to just one glass (5 ounces) a day enjoyed with your biggest meal. "One glass a day for both men and women is sufficient to gain the health benefits of wine and avoid the potential harmful effects of excess alcohol consumption," he says.