Occasionally eating instant noodles at night is not harmful, the harm of eating instant noodles at night often have malnutrition, weight gain, affect the gastrointestinal digestive ability, etc., so it is not recommended to eat instant noodles at night often. 1. malnutrition: because the nutritional value of instant noodles itself is relatively low, mainly pasta and flavorings, in which minerals, proteins and vitamins and other beneficial nutrients are relatively small, if you often eat instant noodles at night, may lead to malnutrition of the human body. 2. Weight gain: instant noodles this food belongs to the fried food, if you often eat instant noodles at night, may make the human body because of excessive intake of calories, which leads to the human body to produce fat, so that the human body to appear the situation of weight gain. 3. Impact on gastrointestinal digestion: eating instant noodles at night, may be because of the preservatives and additives and other substances in the gastrointestinal mucosa caused by irritation, may allow the human body to gastrointestinal dysfunction, which is more likely to abdominal pain and bloating and other discomforts.