Recent research conducted on dietary fiber sources concludes that there are so many utilized and under-utilized sources of dietary fiber which are classified as water soluble and insoluble. These carbohydrates remain undigested in alimentary canal of human digestive system. When incorporated in diet, these may perform various physiological functions related to digestive system, diabetes and heart diseases. Due to their certain physico-chemical properties (such as viscosity, water holding capacity, solubility and gel formation), these carbohydrates can also improve the textural and rheological properties of food products. These indigestible carbohydrate sources can be used as partial replacement of flour and or fat in various processed food products.