During the 1950’s-1970’s, researches a series of independent
observational consumption studies suggested that dietary fiber (_B_3__) intake was associated with a number of health benefits. Dietary fibre as a class of (__E_4___) compounds includes a mixture of plant carbohydrate polymers, both oligosaccharides and polysaccharides, (___5__A__) e.g., cellulose, hemicelluloses, pectic substances,
Gums, resistant starc, and inulin.