Morning cortisol release helps promote fat mobilisation. In the presence of high insulin levels cortisol tends to promote fat accumulation. In part this is one of the reasons some suggest not having carbs with breakfast.
Nutrition is key to great health. Its also a very confusing subject. People are told this is good for you that is bad for you, which just adds to the confusion. There is one food source that many consume under the impression that it's healthy.