A severe lack of sleep creates the risk that different parts of the brain move into a phase of slow-wave sleep while being in a state of wakefulness. As a result, a person can’t concentrate and their fine motor skills deteriorate. Regular sleep deprivation leads to brain cell death.Skipping the morning meal affects your performance and energy during the day. It seems obvious, but the point here is not so much the consumption of energy necessary for the body, but the fact that when you skip your breakfast, this lowers the level of sugar in your blood.In fact, excessive amounts of sugar cause problems with digesting proteins and nutrients. It leads to the same result as the low level of blood sugar: your brain does not receive enough nutrients Stress leads to poor memory, anxiety, and the feeling that everything goes wrong.