Olive Leaf Tea Olive leaves health benefits. Olive leaves have been used for their health benefits in various ways since ancient times. Dried olive leaves boiled in hot water for about 10 minutes make a drink that is rich in vitamin E, increases energy & blood flow of the coronary vessels and lowers blood pressure and LDL cholesterol. It also has an antioxidant effect, is hypotensive and antipyretic. Acts against rheumatism, arthritis, diabetes and has a protective role against cancer.