Not eating will only promote appetite. As a result, eating a little food will easily synthesize fat, and then because most of the energy is stored, blood sugar will drop, and the human body will soon feel hungry and appetite will rise again. Therefore, skipping a meal casually, or having a full meal with an empty stomach, not only can't lose weight, but it is easy to make people fat.

It is a common experience for people to growl when they are hungry.

Why are you hungry? This is the feeling of the nerve center. We eat every day, and the food we eat is usually emptied from our stomachs in about 4-5 hours. At this time, the stomach will begin to contract violently. The time of gastric emptying is closely related to the composition of food. If it is a pure sugar food, it usually takes about 2 hours to empty. For protein food, it takes about 3-4 hours, while for pure fat food, it takes about 5-6 hours. Therefore, it is usually mixed for 4-5 hours.

The rate of gastric emptying is also directly proportional to the amount of food eaten. If there is 100 ml chyme in the stomach, about 5 ml is discharged every minute, and when the capacity of chyme in the stomach reaches 500 ml, 15 ml can be emptied every minute.

After the contents of the stomach were emptied, the stomach began to contract. This is a severe contraction, starting from the cardia and creeping towards the pylorus. This contraction makes people feel hungry; It's a sign that you should eat.

At any time, there is always a certain amount of liquid and gas in the stomach. The liquid is generally the digestive juice secreted by the gastric mucosa, and the amount will not be too much. Gas is usually swallowed with food when eating. In this way, when the stomach wall contracts violently, these liquids and gases in the stomach will be squeezed and squeezed, just like when washing clothes, if a certain amount of air is wrapped in clothes and rubbed in water, it will make a sucking sound. These two situations are the same.