Millet, black beans, Redmi, cornflakes, etc. It is not a miscellaneous grain in the strict sense. Due to fine production and processing, dietary fiber and B vitamins are seriously lost. Real coarse grains refer to coarse grains with high dietary fiber, such as miscellaneous beans, black wheat, black rice, oatmeal, etc., which are not suitable for eating coarse grains often. Groups with poor gastrointestinal function. For people with congenital poor gastrointestinal function, eating coarse grains will also increase gastrointestinal pressure, which will easily lead to indigestion and even primary malnutrition; Lack of calcium, iron and zinc.

Because miscellaneous grains are rich in phytic acid and dietary fiber, preventing the human body from digesting, absorbing and utilizing this mineral will further aggravate the lack; People with digestive tract diseases. For example, patients with ascites caused by cirrhosis, esophageal varices or gastric ulcer, eating a lot of miscellaneous grains is easy to cause venous bleeding and ulcer bleeding; A group with decreased immunity. If you consume too much dietary fiber for a long time, and the intake of vitamins and nutrients that regulate immunity is insufficient, it will aggravate the decline of human immunity; Groups with large physical strength and momentum.

Coarse grains are not given enough nutrition for people who are engaged in heavy physical labor; Growing middle school students. Because the requirements for nutrients and energy are relatively high during the growth and development period, excessive intake of miscellaneous grains will hinder the absorption and utilization of nutrients. Old people and children. The digestion and absorption function of the elderly is decreased, while that of children is not perfect. Digesting and absorbing a large amount of dietary fiber has a heavy burden on the stomach, and the absorption and utilization rate of nutrients is also very low, which is not conducive to the nutritional absorption of the elderly and children and will affect human functions.

Eating coarse grains must be scientific and reasonable, and it should be different, instead of unilaterally emphasizing the benefits brought by coarse grains and ignoring the physiological needs of special families, otherwise it will not pay off. Coarse grain rice with a lot of vegetables and a little fish, eggs and milk. This combination can not only complete the intake of dietary fiber, vitamins, carbonate and other trace elements, but also improve postprandial blood sugar without excessive coarseness or bleaching. Eating too much miscellaneous grains will affect digestion and absorption. Excessive fiber can lead to gastrointestinal obstruction, dehydration and other infectious periods.