Fifth, the prevention of cancer. Eggs contain more vitamin B2, vitamin B2 can be broken down and oxidized in the human body carcinogens. Trace elements in eggs, such as selenium, zinc, also have anti-cancer effect. According to the world the analysis of human cancer mortality, cancer mortality was found with intake of selenium is inversely proportional. Residents of high selenium content in blood or eat food rich in selenium content in the area, the overall cancer death rate is lower than those residents in low selenium intake where the mortality rate.