Excessive intake of coarse grains will cause imbalance in nutrient intake, affect mineral absorption and increase digestive burden. Whole grains contain carbohydrates, protein and other nutrients, which can supplement energy and support human physiological activities. Coarse grains are basically unprocessed, and the original trace elements are not destroyed. Compared with white rice flour, coarse grains contain more vitamins and minerals, such as vitamin B 1, vitamin B2, vitamin E, iron and zinc. Appropriate intake of coarse grains can supplement trace elements.
Coarse grains contain dietary fiber, which can increase satiety, promote gastrointestinal peristalsis, prevent constipation and control energy. However, long-term excessive intake of coarse grains and reduction of other foods will lead to unbalanced nutritional intake. Excessive intake of dietary fiber will also affect the absorption of minerals, leading to the lack of nutrients such as calcium and iron. Moreover, the digestion speed of coarse grains is slow, which will increase the digestive burden. Whole grains provide sufficient vitamins and minerals for human body, especially those in germ and bran, so the benefits of vitamin and mineral supplementation are also obvious.
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