Wine, especially, has received a lot of attention for its possible role in reducing the risk of heart disease among moderate wine-drinkers. No one knows exactly how wine does this, but there are many theories. Other studies look at its blood-thinning properties. Still others focus on naturally-occurring chemicals in grapes themselves. Researchers are now studying the protective effects of unfermented grape juice.
Most evidence comes from studies of moderate alcohol consumption.
This is defined as no more than two drinks per day for an average healthy man and no more than one drink a day for the average healthy woman. Different people handle alcohol differently. What is moderate for one person may be excessive for another. It is your responsibility to determine what moderation is for you. Talk to your health care provider about how alcohol fits into your own health picture.