Breakfast replenishes blood glucose levels which have become depleted during the night.
Cells continue to metabolize nutrients during the night, which means the cells need to replenish their energy source upon waking. This is especially important for the brain because its primary fuel source, glucose, cannot be stored for long periods of time. Breakfast improves strength and endurance in the late mornings. The strength and endurance received from eating a healthy breakfast improves physical and cognitive performance. These improvements lead to a better attitude towards school and work.