Red Wine Helps Cardiovascular Health, But Is It the Alcohol or Something Else?

Two studies show different results on the source of wine's heart health benefit.(..)

Previous studies suggest that red wine is responsible for improved blood flow, which helps keep the heart and the body in better health, but whether that's due to polyphenols or alcohol, or both, is still unclear. A study from the Research Laboratories at the Catholic University of Campobasso, Italy, claims the alcohol, not the antioxidants, helps prevent another heart attack or stroke.

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"Our research highlights another crucial issue: Drinking has not only to be moderate, but also regular," said co-author and university epidemiologist Licia Iacoviello in a statement. "Moderate consumption spread along the week is positive. The same amount of weekly alcohol, concentrated in a couple of days, is definitely harmful."

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A study conducted at the University of Surrey, England, published in the Journal of Human Nutrition and Dietetics, suggests that alcohol may not be the only factor, however. A research team found that people who drank a kind of simulated wine—alcohol mixed with red grape juice—during mealtime showed several markers of improved cardiovascular health. Those who drank just water did not see the same levels of improved blood flow. Those who drank just grape juice saw slightly lower benefits.