If it is a long-term single corn porridge without balanced intake of other foods, it may produce malnutrition, elevated blood sugar, impaired digestive function and other bad effects. 1. Malnutrition: If you drink porridge for a long time without balanced intake of other nutrients needed by the body, such as protein, dietary fiber, vitamins, etc., the body will lack of nutrients, which is not conducive to good health, and in the long run, malnutrition will occur. 2. Elevated blood sugar: corn and rice after a long time after boiling, corn and rice in the carbohydrates will be fully released, carbohydrates into the body will become sugar, high blood sugar patients drink porridge is easy to cause blood sugar fluctuations, resulting in elevated blood sugar. 3. Digestive function degradation: corn porridge consumption generally do not need too much chewing, and into the stomach and intestines are easily digested, the frequency of gastrointestinal peristalsis will be greatly reduced, if long-term, a single drink of corn porridge, may lead to a decline in gastrointestinal digestive function. It is recommended that when consuming maize porridge can be combined with meat, vegetables, fruits and other foods together to ensure that the body needs balanced intake of nutrients.