Bran About 14.5 percent of the kernel weight.Bran is included in whole wheat flour and is also available separately.The bran contains a small amount of protein,largerquantities of the B-complex, vitamins, minerals and indigestible cellulose material also called dietry fibre. Fibre Fibre is the indigestible carbo hydratev in food.Fiber acts as broom to sweep out digestive tract.adequate fiber in the diet has also been related to lesser incidence of cancer of the colon and some type of heart diseases.Adequate fiber in the diet has alsobeen related to better control of diabetes and an overall healthy colon.