Oat bran is the outer layer of the oat grain. During processing, this husk, which contains the majority of the dietary fibre, is often lost. Oat bran is often added to grain products to increase their fibre content or used in baking to create certain textures and nutty flavours. Approximately half of oat bran’s fibre is soluble fibre, which lowers harmful LDL blood cholesterol. Oat bran also provides B vitamins.