I sometimes am asked questions about whether or not eating breakfast is important. Frequently asked that, actually. There are, of course, opinions on both sides of the question. My brain's opinion is that breakfast is critically important for your brain. Breaking the fast from sleeping (unless you get up and snack at night!) boots up the brain much like you boot up a computer. Bogy cells can generate energy from fats, proteins, and carbohydrates; not so with brain cells. Glucose from carbs is the preferred source (if not the only) of fuel that the brain cells can use. Due to its rapidmetabolism, the brain requires minute-to-minute glucose. For example, 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. Those recommended in 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)