Oat bran is a key component of the Dukan Diet, the unique 4-step programme which combines two steps to lose your unwanted weight and two steps to keep it off for good. Not only does it reduce hunger, it also helps to reduce cholesterol, prevent diabetes and cancer, as well as aiding digestion. By eating oat bran as part of the Dukan Diet weight-loss programme, you can lose the weight you want like millions of others have around the world.