people whose Gastrointestinal function is weak
eating too much dietary fiber on gastrointestinal is a great burden to them.
Calcium deficiency, iron and other elements of the crowd
Because of coarse grains contain phytic acid and dietary fiber inside, will combine to form precipitation, impede the body's absorption of minerals.
Of people suffering from digestive diseases
If you suffer from liver cirrhosis esophageal varices or gastric ulcer, eating a large number of coarse grains easy bleeding and ulcers caused by venous bleeding.
Immunocompromised people
If long-term daily intake of fiber more than 50 grams, will make people blocked a protein supplement, fat utilization reduced, resulting in bone, heart, blood, organ damage, reduce the body's immunity.
More emphasis on physical activity of people
Coarse grains with low nutritional value for can be less engaged in heavy manual labor for those who provide inadequate nutrition.
Period of growth and development of young people
The youth growth and development of the special needs of nutrients and energy, as well as the physiological requirements for the hormone levels, coarse grains not only hindered the absorption of cholesterol and its conversion into the hormone, but also hinder the absorption of nutrients and utilization.
The elderly and children
Because the elderly digestive dysfunction, while the child's digestive function yet to be perfected to digest a lot of dietary fiber for the GI is a great burden. And nutrient absorption and utilization of relatively low, is not conducive to child growth and development.
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