Moderate consumption of wine – and alcohol in general – can prevent blood clotting. Wine acts as a natural blood thinner, breaking up any blood clots that could lead to a stroke. This lower risk of blood clotting is more beneficial to females than males.
Red wine, in particular, contains phenols that act as a blood thinner in a similar regard to aspirin – and resveratrol is mostly to thank. A study done by John Hopkins University Medical Center found that resveratrol found in red grape skins could protect against stroke when the grapes were turned into wine.
Beware, while light to moderate consumption may be good in preventing a stroke, heavy drinkers are more likely to have the opposite effect, resulting in a higher risk of heart attacks, not a lower risk. Like all good things in life, moderation is key.