During the 1950’s-1970’s,researches a series of independent
observational consumption studies suggested that dietary fiber (__3__) intake was associated with a number of health benefits. Dietary fibre as a class of (___4___) compounds includes a mixture of plant carbohydrate polymers, both oligosaccharides and polysaccharides, for examples e.g., cellulose, hemicelluloses, pectic substances,
Gums, resistant starc, and inulin.