Corn is a kind of coarse food rich in dietary fiber, vitamins, minerals and phytochemicals, with a variety of effects such as promoting intestinal peristalsis and helping digestion, doctors recommend eating less corn is mostly seen in the following cases: 1, special groups: 1, indigestion: because corn contains a lot of plant fiber can promote the gastrointestinal tract activities, if eaten too much, it will cause a burden on the gastrointestinal tract, so should eat less; 2. Gastric fundic varices: such as cirrhosis, viral hepatitis and other patients, are likely to appear in the fundic varices, and corn is relatively hard texture, if too much eating may occur to trigger bleeding, venous rupture; 3, nutritional absorption disorders: corn contains more plant fiber, in a large number of eating will be deposited in the gastrointestinal tract, more unfavorable to nutrient absorption; 4, high nutritional needs: corn is only a cereal food. Nutrients are not sufficient, a single large amount of eating may affect the intake of other foods, for a large number of activities, too thin, as well as in the development of children, adolescents, is not conducive to the overall supplementation of nutrition, and in serious cases may lead to a decline in body resistance. Second, unhealthy corn: 1, too many additives: corn in the processing process, if you add more additives, long-term use will cause damage to human health, so should eat less; 2, placed too long: placed in a humid environment for too long corn will contain aflatoxin, a harmful substance to the human body, so it is not recommended; 3, undercooked: undercooked corn is not conducive to digestion, will cause damage to digestive It is not recommended to eat.