Black rice is a nutrient-rich food that is usually harmless when taken for a long time, but it should be consumed in moderation, as it may cause discomfort if consumed in excess. First of all, black rice is is also a kind of rice, just different from the rice variety. Black rice contains dietary fiber, anthocyanins, protein, multivitamins, iron, etc., with anti-aging, prevention of atherosclerosis, improve anemia, enhance resistance, satiety, and help regulate blood sugar, blood lipids, and laxative effects. Compared with rice, it is richer in nutrients and can replenish the energy consumed by the body such as carbohydrates and vitamins after consumption. Second, although black rice has the above benefits, but the consumption of black rice still need to avoid excessive consumption, so as not to cause discomfort. Therefore, the consumption of black rice has the following points of caution: 1. Black rice is a high-fiber food, a large amount of black rice or black rice cooked poorly, easy to cause a burden on the stomach and intestines, indigestion, abdominal pain, bloating, constipation and other discomfort. Especially for the elderly and children with weak digestive function easily cause gastrointestinal inflammation; 2, because of the high dietary fiber in black rice, for women of childbearing age, a large amount of consumption is likely to cause endocrine disruption, which may reduce the chances of pregnancy; 3, for people with hepatomegaly and taking tetracycline antibiotic drugs is not recommended to eat, because the nutrients in black rice contain metal ions, which may aggravate liver disease or with drug reaction, affecting the treatment of digestion, so it is not recommended for these two groups of people to eat. Therefore, although black rice is good, it is recommended to eat, while the nutritional mix should be balanced, eat more fresh vegetables and fruits to avoid malnutrition.