cupful bran

Bran is the hard outer layers of cereal grain kernels, consisting of the pericarp, seed coat, and aleurone layer that encase the endosperm and germ. It is produced as a byproduct of grain milling when whole grains are refined into white flour or meal. Bran is distinguished by its coarse, fibrous texture and nutty flavor, and contains significantly higher concentrations of fiber, minerals, and B vitamins compared to the refined endosperm.

The most common sources are wheat bran, oat bran, and rice bran, though bran can be derived from barley, rye, corn, and other cereal grains. Wheat bran is the most widely available and consists of flakes with a tan to brown color. Oat bran is finer in texture and has a milder, slightly sweet flavor, while rice bran is exceptionally fine and often used in Asian cuisine.

Bran is primarily used as a nutritional supplement and ingredient in baked goods, breakfast cereals, and porridges to increase fiber and nutrient content. In Western cuisine, it appears in whole-grain breads, muffins, cookies, and granolas. Oat bran is commonly used to thicken soups and stews, and as a coating for baking. Rice bran is essential in Japanese and Southeast Asian cooking, used in broths, sprinkled as a garnish, and incorporated into traditional dishes. Bran can also be sprinkled directly over yogurt, smoothies, and breakfast bowls for added texture and nutrition, though excessive consumption should be moderated due to its phytic acid content, which can inhibit mineral absorption.