The natural antioxidant properties of tea may help combat the risk of developing Coronary Heart Disease. Research has suggested that drinking around 4-5 cups of tea a day may have beneficial effect on two long established heart disease risk factors : high blood cholesterol and high blood pressure.
Studies have shown that average blood cholesterol and blood pressure drop, as tea consumption increases and experts believe the flavanoids in tea are responsible for the effect. Other studies have shown that tea flavanoids may also decrease blood clotting which is another common cause of cardiovascular disease.

Now scientific studies are finding that tea is rich in the plant substances known as flavanoids, which function as antioxidants that neutralize free radicals that can damage cells and lead to diseases such as cancer and heart disease. Researchers from several countries and have presented evidence suggests that black teas, green teas and oolong teas, have a protective capability against oral, lung, colon and other cancers. Green teas especially ,with more than thirty polyphenols, has unique beneficial effects on the human system.
These polyphenols are found in fruits and vegetables and act as antioxidants like vitamin C,E and beta carotene and may reduce serum cholesterol and the risk of heart disease and stroke.

Although the healthful effects have been known to countless generations, recent research shows that drinking tea both black and green, can lead to a long and healthy life.
In addition to being a soothing, calming beverage, tea is reported to aid digestion, strenghten the immune system, and reduce the risk of heart disease, all of which play a role in healthy aging. The fluoride in tea can strengthen bones in the same way it strengthens dental enamel. Recent studies in the United States, China and Japan found that drinking green tea inhibits the formation action cancer causing substances, such as nitrosamines, which are the byproducts of cooking meats and fish.

In addition to other dietary and lifestyle factors, tea has been shown to contribute to a healthy heart. By inhibiting the absorption of cholesterol in the digestive tract, tea helps prevents the formation of unwanted clots which may cause a heart attack or stroke . All types of tea, black, green and oolong, contains some caffeine, although the amounts vary .
green tea, which is not fermented, has about one third the caffeine per cup of black tea. Coffee by constrast, has about twice as much caffeine as black tea.