1. Premature breakfast will interfere with gastrointestinal rest. When people sleep, most organs are fully rested, while the digestive organs are still digesting and absorbing the food left in the gastrointestinal tract the day before, and gradually enter a state of rest in the morning. Therefore, if breakfast is eaten too early, it will inevitably interfere with the rest of the gastrointestinal tract and make the digestive system in a state of fatigue for a long time. 2. Eating breakfast at night is good for removing metabolites. People's blood is turbid in the morning, and the metabolites of the previous day need to be removed in time. If you eat too early, it is not conducive to removing metabolites. The functions of various organs of the elderly are gradually declining, especially after the function of digestive organs declines, metabolism needs more time and energy. If you eat too early, the energy is transferred to digest food, and the normal circulation will inevitably be disturbed. Metabolites cannot be eliminated in time, and accumulated in the body will become the inducing factors of various elderly diseases. 3. Poor appetite needs to delay breakfast. In the morning, lack of water in the body, the body's stomach fluid is not moist, which often makes people have low appetite, especially for the elderly, which needs to postpone breakfast time. And it is best not to eat fried, hard and greasy food for breakfast, otherwise it will cause food to stay in the stomach and cause indigestion. Breakfast for the elderly is best made of milk, noodles, soybean milk, bread, etc., which are nutritious and easy to digest. It is especially suitable for drinking porridge, because porridge is beneficial to the body's absorption. If you can add lotus seeds, tremella, red dates, etc. to the porridge, the effect will be better. 4. Postpone breakfast time accordingly after hydrating. After a night's sleep, people excrete a lot of water from urine, skin and breathing, and get up in the morning in a physiological state of water shortage. If you don't replenish water in time, it is not conducive to the metabolism of liver and kidney and the discharge of metabolites, and it is also not conducive to the absorption of breakfast food. Eating breakfast without hydration is more likely to cause constipation and induce cerebral thrombosis, myocardial infarction and kidney diseases. Therefore, the elderly should replenish water first in the morning, and then eat breakfast after half an hour to an hour, which is a necessary condition for eating breakfast well. So eating breakfast late is good for health.