soluble fibre

The part of the dietary fibre (or non-starch polysaccharide) that forms a gel in water and hence is soluble, i.e. pectins and plant gums. These increase the viscosity of the intestinal contents.

Dietary fibre found especially in oat bran. Soluble fibre may chemically prevent or reduce the absorption of cholesterol and some other substances into the bloodstream. It may also help regulate blood glucose levels.