One Major Side Effect of Drinking Red Wine, Says New Study One Major Side Effect of Drinking Red Wine, Says New Study It's well-known that drinking wine in moderation may have several science-backed health benefits. As Kelli McGrane, MS, RD, a registered dietitian for the food-tracking app Lose It!explained to us, moderate wine consumption is associated with a reduced risk of heart disease and stroke, is known to help protect against diabetes, and may help increase your body's level of heart-healthy omega-3 fatty acids. One study published in the journal BMC Medicineeven found that people wh...