Red wine is known for its heart-healthy compounds, but a glass a day may hold promise for people with type 2 diabetes, say researchers from the University of Massachusetts Amherst.

According to the UMass scientists, blood glucose levels rise sharply in people with type 2 after they finish a meal high in carbohydrates. But, the natural antioxidants found in red wine may slow the passage of glucose through the small intestine and eventually into the bloodstream, thus prevent this spike.

The researchers also tested other popular drinks for their affect on blood sugar, finding that red wine was clearly the most successful in preventing a spike. However, though not as effective as red wine, black tea, oolong tea, green tea, and white wine had some effect.