Common wheat bran

the bran fractions consist of the pericarp, testa, and hyaline and aleurone layers. by weight, the wheat caryopsis is composed of an outer branny husk (14–16% of the grain), the germ or embryo (2–3%), and the central endosperm (mainly starch: 81–84%)

wheat bran is used as a source of dietary fiber for preventing colon diseases (including cancer), stomach cancer, breast cancer, gallbladder disease, hemorrhoids and hiatal hernia. it is also used for treating constipation, irritable bowel syndrome (ibs), high cholesterol, high blood pressure, and type 2 diabetes