Research focused on effects of tea started in Japan and China which continued in Europe and the United States has shown that the polyphenols in tea reduce the risk of developing heart diseases and cancers. Other effects of tea include lowering blood sugar and cholesterol levels and strengthening the heart, stimulating blood circulation and protecting the liver. Not only is daily consumption of 6 teaspoons of dry tea (equivalent to more than 12 glasses of tea) not harmful but it is also beneficial.