Excessive consumption of coarse grains is also detrimental to health Because coarse grains are simple to process and retain more nutrients, such as rich dietary fiber, B vitamins and antioxidants, proper consumption of coarse grains is beneficial to avoid chronic diseases such as obesity and diabetes, and compared with fine grains, coarse grains are more beneficial to prevent high blood sugar. Since coarse grains are so good and can reduce blood sugar, so we can eat more coarse grains? In fact, not, coarse grains and fine grains will raise blood sugar, but coarse grains contain more dietary fiber. 1, coarse grains eat too much, will affect the digestion, because the coarse grain dietary fiber content is high, too much consumption will lead to upper abdominal distension, serious may lead to intestinal obstruction, dehydration and other symptoms. So eat coarse grains, one to drink more water, dietary fiber needs sufficient water to do lubrication to protect the normal work of the intestines; two to eat coarse grains gradually, suddenly increase or reduce the amount of coarse grains eaten, will cause intestinal reactions. 2, too much consumption of coarse grains, mechanical damage to the digestive tract mucosa, coarse grains are coarse, will scratch the digestive tract mucosa. Like the elderly and children and gastrointestinal function is relatively weak people, after eating a large amount of coarse grains, may appear epigastric discomfort, belching, bloating, reduced appetite and other symptoms, and may even affect the next meal. 3, interference with drug absorption, too much dietary fiber intake will interfere with drug absorption, reducing the drug, such as reducing the drug properties of certain lipid-lowering drugs and antipsychotics; will also affect the absorption of calcium, iron, zinc and other nutrients. This may be deficient in these elements for the elderly, special populations of pregnant women and patients, it is like “adding insult to injury”. For example, if oatmeal is eaten together with iron supplements used to relieve anemia in pregnant women, or with calcium supplements, it will affect the absorption of iron and calcium in pregnant women; if you eat dairy products while eating coarse grains with high fiber content, it will also affect the absorption of calcium. In addition, the intake of large amounts of fiber will also affect the absorption of fat and cholesterol, you can take drugs or supplements forty minutes after the meal. 4, long-term excessive consumption of coarse grains, may reduce the digestion and absorption rate of protein. Protein supplementation should emphasize the amount of supplementation on the one hand, and pay attention to the digestion and absorption rate of protein on the other. Eating large amounts of coarse grains, which insoluble dietary fiber, will lead to slow gastrointestinal peristalsis, making the digestion and absorption of protein even weaker. If there is weight loss or high blood lipid, high blood sugar people intentionally reduce the intake of meat, eggs, milk and other foods containing high quality protein, this positive and negative superimposed “effect”, often leading to a negative nitrogen balance, so that the plasma protein level is reduced, in the long run, may cause protein malnutrition. 5, for diabetic patients, too much roughage at once, may lead to the occurrence of hypoglycemia, especially the injection of insulin patients should strictly control the amount of injection. Some diabetic patients suddenly change from low-fiber diet to high-fiber diet in a short period of time, which will lead to a series of intolerance reactions in the digestive tract and also make the energy-containing nutrients (such as sugar, lipids, etc.) cannot be absorbed in time and lead to hypoglycemic reactions. 6.The metabolic ability of the elderly body is reduced, and the regulation ability of the digestive system is also reduced. Long-term consumption of too much coarse grains and other foods with high dietary fiber will make the elderly’s protein supplementation obstructed, fat intake reduced, the lack of trace elements, so that bones, organ function, hematopoietic function is affected. Older people eat coarse grains 1-2 times a week, no more than 50 grams each time. It is recommended to eat millet porridge or corn hair cake, etc. Fermented foods like hair cake will produce a plant acidase in the process of fermentation, and this plant acidase can break down phytic acid, so as to avoid the problem of affecting nutrient absorption.