Hello everybody, welcome to cancer prevention 60 seconds. The topic today is sweet potato’s secret. Although common sweet potato can be found everywhere, it is treated as anti-cancer hero. Japanese Cancer Research Center publishes that sweet potato ranks first among twenty kinds of anti-cancer vegetables. Research on Longevity Country in Guangxi by medical workers finds that local old people are used to eat sweet potato daily. Sweet potato is full of dietary fibers, which can improve intestinal tract and bowel movement, and eliminate toxin. Therefore, it can treat constipation and prevent colon and rectal cancer. Sweet potato can prevent diabetes and cardiovascular disease. But it should be cooked or steamed well, and do not eat excessively at one time in case of heartburn, sour regurgitation or abdominal distension.