The confluence with gastric bowel wrong function. The crowd with gastric bowel younger function, eating fiber of too much food is very great burden to gastric bowel.
Lack the crowd of the element such as calcic, iron. Because establish acid and food fiber are contained in coarse food grain, meeting union forms precipitation, block up airframe is right mineral absorption.
Have the multitude of digestion disease. If suffer from liver cirrhosis esophagus varicosity or it is gastric ulcer, eat a large number of coarse food grain easy cause vein burst haemorrhage and cankerous haemorrhage.
The crowd with immune low power. If be absorbed for a long time everyday cellulose exceeds 50 grams, can make protein compensatory suffocate suffocate of the person, adipose utilization rate is reduced, build what wait for viscera function into skeletal, heart, blood to damage, reduce the immune capacity of human body.
Manual activity compares heavy crowd. Value of nutrition of coarse food grain is low, offer can little, to be engaged in the person of hard physical labor character nutrition offers inadequacy.
Grow development period is teenage. Because grow,development asks to the special demand of nutriment and energy and the physiology to hormone level, coarse food grain not only block up cholesterol is absorbed and its are changed into hormone, the absorption of cloggy also nutriment and use.
Old people and child. Because the digestive function of old people drops, and digestive function of the child had be notted perfect, digest many food fiber to gastric bowel it is very great burden. And the absorption of nutriment and utilization rate are lower, the growth that goes against a child development.