1. Green tea
In test tube studies, a powerful compound in green tea called epigallocatechin-3-gallate (EGCG) blocked many processes involved with cancer development and growth. Population studies suggest it may protect against several cancers, including those of the esophagus, stomach, prostate and breast. Some research has found no benefit for people with cancer. But one Chinese study on women with a certain type of ovarian cancer found that those who drank the most green tea after their diagnosis had higher survival rates than those who drank the least. More research is under way, so stay tuned. Meanwhile, go ahead and drink two to four cups a day if you enjoy the light flavour of this delicate tea, which is also rich in antioxidants.