rice bran

Rice bran is the hard outer layer of the rice grain that remains after the removal of the husk during the milling process. It consists of the aleurone layer, sub-aleurone layer, and germ of the rice kernel, and is typically separated from the white endosperm when rice is polished. Rice bran is a byproduct of white rice production, though it represents one of the most nutrient-dense components of the grain. The bran has a slightly nutty, earthy flavor and a fine, powdery texture when ground, with a light tan to brown color depending on the rice variety and processing method.

Rice bran's composition varies by rice type—white rice bran, brown rice flour, and specialty varieties like red or black rice bran offer different nutritional profiles and functional properties. In its raw form, rice bran is relatively unstable due to the presence of lipase enzymes that can cause rancidity; stabilized rice bran, processed with heat, extends shelf life and is commonly available commercially.

Rice bran is used primarily as a nutritional supplement and ingredient in health-oriented cooking rather than as a primary ingredient. It is incorporated into baked goods, cereals, smoothies, and granola to boost fiber, mineral, and antioxidant content. In Asian cuisines, rice bran oil—extracted from the bran—is valued for high-heat cooking and has a mild, neutral flavor. Rice bran also serves as a thickening agent in gluten-free baking and can be used as a coating for fried foods. Small amounts are added to soups, porridges, and grain blends to enhance nutritional density without significantly altering flavor.