A positive correlation between wine and good health has been thought to exist ever since man first discovered that the fermentation of grape juice can yield such a fabulous drink. Wine, particularly red wine, has been thought of as an excellent medicine for various ailments, especially cardiovascular disease, but also as a treatment for diarrhea and indigestion among other things. Wine has been used continuously as a medicine or a medical supplement for thousands of years.

Research on the link between health and wine stalled somewhat in the 20th century with the appearance of widespread concerns about alcoholism and its effects; however, there has been a resurgence of increased scientific interest in the subject since the 1990s, with various tests having been performed that positively correlate moderate consumption of wine with positive health benefits, particularly for cardiovascular health.

The component of wine that contributes to good health has been shown to be a substance known as resveratrol, a phenolic compound that is derived mainly from grape skin. Different grape varieties have differing levels of resveratrol in them; it is said that the grapes cultivated in the cooler climates yield more of this beneficial substance than warmer-climate grape varieties. Given the benefits of resveratrol, it is also often sold as a supplement. Extensive research into the effects of resveratrol consumption may be able to explain and confirm the supposed link between wine and heart health as well as the relationship between red wine and cholesterol.

If you do not drink at all, consider drinking red wine for health purposes in moderate quantities — no more than a couple of glasses a day. The moderation part is important, however; over-consumption of alcohol has been shown to be extremely damaging to the body, especially in the long run.