Dietary fiber - the sum of edible plant cells, polysaccharides, lignin and related substances that cannot be digested and absorbed by human endogenous enzymes.
The difference between dietary fiber and crude fiber
Crude fiber, the residual residue of plants after the action of certain concentration of acid, alkali, alcohol or ether
Classification: according to dissolution characteristics
Insoluble dietary fiber
Water soluble dietary fiber
By source:
Plant sources
Animal origin
Algal polysaccharides
Microbial polysaccharides
Synthesis: carboxymethylcellulose
Fibrous carbohydrate
(1) Cellulose
Glucose is formed by β - (1 → 4) glycoside bond, and it is a linear polysaccharide
(2) Hemicellulose
Arabinoxylan, xylose dextran, galactose Mannan
3. Pectin and pectin substances
Form gel to maintain the structure of dietary fiber.
4. Lignin
Tight binding with carbohydrates
