Drinking tea may help reduce the risk of stroke by up to 21%, researchers found that people who drink at least three cups of tea per day had a stroke just 1/5 compared with people who drank tea less than 1 cup per day. And whether it's green tea or black tea (but must not be too organized as tea) it is useful, because it has the same EGCG antioxidants and amino acids how the blood vessels that can help protect nin.