Table 2.
Structural composition of different dietary fibres (note- “soluble” may indicate “partially soluble” (modified from [9])
| DF | Solubility | Main unit | Branch units | References |
|---|---|---|---|---|
| Cellulose | Insoluble | β- (1,4) Glucose | – | [53] |
| Lignin | Insoluble | Polyphenols | Polyphenols | [54] |
| Resistant starches | Insoluble | Helical amylose | 1,6 glucose in amylopectin | [55] |
| Mix-linkage glucans | Soluble | β- (1,3) glucose | – | [56–58] |
| β- (1,4) glucose | – | |||
|
Hemicelluloses Arabinoxylan Xyloglucan Galactomannans |
Soluble Soluble Soluble |
Xylose Glucose Mannose |
Arabinose Xylose Galactose Glucose |
[56] |
| Pectins | Soluble | Galacturonic acid with methoxy groups |
Arabinose Galactose |
[59] |
|
Gums Guar Agar |
Soluble Soluble |
β −1,4-linked mannose D-galactose & (3,6) anhydro-L-galactose |
Galactose - |
[60] |
|
Non-digestible oligosaccharides Fructooligosaccharide Galactooligosaccharide |
Soluble Soluble |
D-fructose residues Galactose, with terminal glucose unit. |
- - |
[61, 62] |