Studies have shown that eating a healthier breakfast boots up the brain much like you would boot up a computer with an energy source. The brain prefers glucose as its source of energy. Although other parts of the body can use fat, protein, or carbohydrate for energy, the brain functions best with carbohydrate fuel. Due to its rapid metabolism, the brain requires minute-to-minute glucose. Some even say that carbohydrate (glucose source) is the only source of fuel that the brain can use (it cannot burn fat). Glucose levels decline more during a period of intense cognitive processing. Studies in all types of people have shown improved mental ability following a carbohydrate meal. But what type of carbs? Healthier ones, of course, Carbs that are eaten in as natural state as possible and that are relatively low on the Glycemic Index and Glycemic Load lists are better for a Longevity Lifestyle.
(Nedley, Neil, M.D. Proof Positive; Brand-Miller, Jennie, PhD, Thomas M. S. Wolever, MD, PhD, et al. The New Glucose Revolution)