Grapes

According to the American Institute of Cancer Research: "Both grapes and grape juice are rich sources of resveratrol, a specific type of natural plant chemical that belongs to a much larger group of plant chemicals called polyphenols. The skin of the grape contains the most resveratrol, and red and purple grapes contain significantly more resveratrol than green grapes. Grape jam and raisins contain much smaller amounts of this phytochemical. Wine also contains resveratrol. However, with AICR's second expert report noting convincing evidence that alcohol is associated with increased risk for cancers of the mouth, pharynx and larynx, esophagus, breast (pre- and postmenopausal) and colon and rectum (in men), wine is not a recommended source of resveratrol. Scientists believe that polyphenols in general and resveratrol, in particular, possess potent antioxidant and anti-inflammatory properties. In laboratory studies, resveratrol has been able to prevent the kind of damage known to trigger the cancer process in cell, tissue and animal models. Other laboratory research points to resveratrol's ability to slow the growth of cancer cells and inhibit the formation of tumors in lymph, liver, stomach and breast cells. Resveratrol has also triggered the death of leukemic and colon cancer tumors. In one series of studies, resveratrol blocked the development of skin, breast and leukemia cancers at all three stages of the disease (initiation, promotion and progression)."