Single Glass of Red Wine A number of studies have shown that wine drinking can protect one against heart diseases. Now, Canadian scientists have shown in a new study that the health benefits of wine not only stop after consuming one glass of wine, but also adversely affect one’s health.

They say that restricting the drinking of wine to only one glass a day may offer better health benefits than drinking more. The first drink itself may relax blood vessels, reduce the amount of work the heart has to do and thus lowers the risk of heart disease.

The study done by researchers at the University of Toronto found that the health benefits of red wine or other alcoholic drinks not only stop after one glass, it may also have adverse effects on health.

The second glass of wine may increase the risk of high blood pressure, coronary artery disease and heart failure, they said.

In the latest study, scientists gave healthy, non-smoking adults either a 120 ml glass of wine, a 44 ml shot of spirits or water at random.

One alcoholic drink had no adverse effect on heart rate or blood pressure, the scientists found. But two drinks increased heart rate and reduced the ability of arteries to expand to handle the increased blood flow.