Cardiovascular diseases, including heart disease and stroke, are the biggest causes of death in the world. Studies show that green tea can improve some of the main risk factors for these diseases. This includes total cholesterol, LDL (low density lipoprotein) cholesterol and triglycerides.
Green tea also dramatically increases the antioxidant capacity of the blood, which protects the LDL (low density lipoprotein) particles from oxidation, which is one part of the pathway towards heart disease.
Given the beneficial effects on risk factors, it is not surprising to see that green tea drinkers have up to a 31% lower risk of cardiovascular disease.