Some types of fiber bind to these minerals and prevent them from being absorbed. When large amounts of fiber are added to diets high in fats and sweets, nutrient deficiencies may develop. The addition of fiber to the diet should not lead to the exclusion of other nutritious foods. Fiber is just one part of a balanced diet. The dietary fiber content of foods is the one you should look for.
Crude fiber is only the indigestible cellulose and lignin portions of grains, fruits and vegetables.
It is the portion of the food that remains after it is chemically treated with strong acid and alkali. Dietary fiber refers to the combined fiber in food. Because dietary fiber values include cellulose and lignin as well as the other types of fiber, it provides a more accurate assessment of the fiber content of the diet. Laboratory methods to measure dietary fiber values in all foods are still being established. The dietary fiber values for a limited number of foods have been determined, but as the research in this area progresses, these values may change.