While it has long been speculated about the cancer healing powers of tea (both black and green), recent studies have brought a lot of light on that subject. Different studies on different matters have come to same or similar conclusions. While one study showed that extracts from green tea had been shown to slow down the growth of bladder cancer cells while another study showed that drinking green tea acted as a deterrent to throat and stomach cancers. Black tea contains a compound called TF-2 that is responsible for causing apoptosis (programmed death of cancer cells), while the normal cells remain unaffected. Women who have been drinking black tea regularly will have a lower chance of ovarian cancer as compared to non-tea drinkers.