Modern people with the material affluence of life, food has become the pursuit of people’s diet. Although a variety of diets can supplement the different needs of the human body, but some of the collocation of human health is not beneficial, and even harmful, serious cases may cause cancer. Common “cancer with” are: 1, shrimp and crab food can not be eaten with vitamins. Shrimp, crab and other food containing 5-valent arsenic compounds, if eaten with vitamins, arsenic will make the arsenic change into 3-valent arsenic, that is, arsenic is highly toxic, and long-term consumption can lead to human poisoning, decreased immunity. And immunity decline can lead to a variety of cancers. Tip: When eating shrimp, crab and other seafood should be spaced at least 4 hours before eating food containing vitamins. 2, carp should not be eaten with salted vegetables. Carp is rich in protein, and salted vegetables contain nitrite, and the cooking together, will produce chemosynthesis, generate carcinogens – nitrosamines, easy to cause digestive tract cancer. Therefore, carp and salted vegetables should not be eaten with. Tip: eat carp should be accompanied by fresh vegetables. 3, ham and pickled products should not be eaten with lactic acid drinks. Because ham and pickled products contain nitrate, under the action of lactic acid bacteria can be reduced to nitrite, catalyzed by thiocyanate in saliva, produce carcinogens, may cause gastrointestinal, liver and other digestive organs cancer. Tip: 1 hour before and after eating food containing nitrates should not drink lactic acid beverage 4, tea and lamb should not be eaten at the same time. Lamb is rich in protein, and tea contains more tannins, eat lamb when drinking tea, will produce tannins protein, so that the peristalsis of the intestines is weakened, stool water to reduce, which in turn induced constipation. And constipation can lead to increased absorption of intestinal toxins prone to digestive tract tumors. Tip: The same contains more tannic acid fruit persimmons, grapes, pomegranate, hawthorn, etc., the same should not be consumed with lamb, should be spaced out 2 hours 5, radish should not be eaten with fruit. In recent years, scientists have found that cruciferous vegetables such as radish into the human body, the metabolism will soon produce a kind of anti-thyroid substance – thiocyanic acid. At this time, if the intake of fruits containing a large number of plant pigments such as apples, pears, etc., these fruits in the flavonoids in the intestinal tract by the bacterial decomposition, converted into hydroxybenzoic acid, etc., they can strengthen the role of thiocyanic acid inhibition of the thyroid gland, thereby inducing or leading to goiter, and long-term goiter may be triggered by the onset of thyroid cancer. Tip: Cruciferous vegetables such as radish should be consumed at an interval of 4 hours before eating fruits. As we can see from the above, although we used to think that food intake should be varied so as to make the nutrition more balanced, however, with the deepening of people’s understanding of various foods as well as diseases, how to reasonably combine various ingredients to make the organism more healthy will be a matter of increasing concern to us.