#1:. Red grapes
A powerful antioxidant, resveratrol has been found in generous quantities in the skin and juice of red grapes. The National Cancer Institute revealed that resveratrol helps to prevent cancers by limiting the growth of cancer cells. In addition, grapes are very rich in Vitamin C which has been linked to decreased risk of cancers of the colon, bladder, breast and stomach.
#2:. Sweet Potatoes
Sweet Potatoes have proved to be one of the best sources of beta carotene. Beta carotene produces Tumour Necrosis Factor (TNF) which interferes with the growth of tumour cells. One medium-sized sweet potato contains as much as 12mg of beta carotene. When sweet potatoes are served with tomatoes, the lycopene content of the latter enhances the absorption and utilization of beta carotene. A study discovered that eating lots of beta carotene, for instance in sweet potatoes reduced breast cancer risk by 50%.