After each meal, the workload of the gastrointestinal tract will increase immediately, so the blood flowing into the gastrointestinal tract will increase, and these increased blood will be pumped out from other parts of the body. Of course, some of them are extracted from the share of brain supply, which will correspondingly reduce the blood supply to the brain, and this decrease in blood supply to the brain will lead to a decrease in oxygen supply to brain cells, which is also one of the important reasons for sleepiness. Therefore, nutritionists suggest that it is best to eat more foods containing protein in the morning, such as meat. In Britain, the most traditional fried meat or fried eggs is an ideal breakfast form.