Corn is rich in sugar, vitamins and dietary fiber, these nutrients are important for the body to maintain normal body metabolism, long-term eating corn in moderation usually does not produce harm. However, if you eat corn for a long time and eat less of other foods or eat a lot of corn for a long time, it may have an effect on blood sugar and may lead to indigestion or even nutritional imbalance, so it is not recommended to eat corn in a single or large amount for a long time. First, affect blood sugar: corn belongs to the cereal food, containing more sugar substances, these sugars are broken down into glucose in the intestine, for people suffering from abnormal blood sugar metabolism or diabetes, long-term eating corn, especially fruit corn, may lead to increased blood sugar. Second, affect digestion and nutrition: 1, indigestion: more dietary fiber in corn, can help digestion, so patients with constipation can eat in moderation. But the crude fiber in corn is not easy to digest, and adsorption, long-term eating corn can lead to digestive difficulties, bloating and other performance, especially the poor gastrointestinal function of the population, to avoid long-term eating corn; 2, nutritional imbalance: in some areas, corn is used as a staple food, although corn is rich in starch and trace elements, but the niacin in corn (a kind of vitamin B) is not easily decomposed and absorbed by the body If you eat a single diet and eat corn for a long time, it may cause niacin deficiency, resulting in red skin lesions with itching and tingling, and the crude fiber in corn can also affect the body’s absorption of mineral components. If you eat only corn for a long time and eat less of other foods, it can easily lead to nutritional imbalance and even induce anemia. In addition, some people will be allergic to corn, for this type of people, after eating corn will appear itchy skin, rash, diarrhea and other performance, should be avoided. Although corn is rich in nutrients, it is more important to have a balanced diet, so it is recommended to eat corn with other ingredients. Edible alkali can be added when cooking corn to facilitate the decomposition of niacin.