Green tea contains the highest concentration of powerful antioxidants called polyphenols. Antioxidants are substances that get rid of free radicals which are damaging compounds in the body that alter cells, mess with our DNA (genetic material), and even cause cell death. Free radicals occur naturally in the body, but environmental toxins (including ultraviolet rays from the sun, radiation, cigarette smoke, and air pollution) also give rise to these damaging particles.
Many scientists believe that free radicals contribute to the aging process as well as the development of a number of health problems, including cancer and heart disease. Antioxidants such as polyphenols in green tea can neutralize free radicals and may reduce or even help prevent some of the damage they cause keeping us strong, healthy and ward off aging.
AtherosclerosisThis is a condition where the artery walls thicken from the accumulation of fats such as cholesterol. Clinical studies indicate that the antioxidant properties of green tea may help prevent Atherosclerosis, particularly Coronary Artery Disease. Researchers estimate that the chance of heart attack decreases by 11% by drinking 3 cups of tea per day.
High CholesterolResearch shows that green tea lowers total cholesterol and raises HDL (GOOD) cholesterol. One study found that people who drink green tea, are more likely to have lower total cholesterol than those who do not drink it. Results from one study suggests that Polyphenols in green tea may block the intestinal absorption of cholesterol and promote it's excretion from the body. In another study, researchers found that green tea significantly reduced blood levels of harmful LDL cholesterol.
CancerSeveral studies have shown that both green and black teas helps boost the immune system, helping protect against cancer. The latest findings suggest that EGCg, a compound found in green tea, helps repair damaged DNA which may also help in the prevention of cancer. Emerging clinical studies suggest that the Polyphenols in green tea, may play an important role, because researchers believe they help kill cancerous cells and stop their progression. One example would be a country such as Japan, where people regularly consume green tea, and cancer rates tend to be very low.
Read More : http://thescienceofeating.com/2015/02/19/benefits-green-tea/