One glass of wine a day

The health effects of wine are mainly determined by its active ingredient alcohol. Drinking small quantities of alcohol (up to one drink per day for women and one to two drinks per day for men) is associated with a decreased risk of heart disease, stroke, diabetes mellitus, and early death.
Drinking more than this amount, however, increases the risk of heart disease, high blood pressure, atrial fibrillation, and stroke. Risk is greater in younger people due to binge drinking which may result in violence or accidents. About 3.3 million deaths (5.9% of all deaths) are believed to be due to alcohol each year. Alcoholism reduces a person's life expectancy by around ten years.