Why can the elderly live longer if they restrict their food intake?

　　Research has found that elderly people can live longer if they restrict their food intake. So what is the specific reason? After a long period of scientific exploration, scientists proposed. Researchers have extended the lifespan of mice and flies by 1.2 times by reducing caloric intake. Based on this, scientists believe that limiting food intake from middle age can also extend people's lifespan.

　　So why does food restriction make people live longer? This is mainly because:

　　1. Food restriction can reduce the burden on the gastrointestinal tract.

　　Frequent overeating will increase the burden on the gastrointestinal tract and lead to indigestion. In this way, undigested food remains in the intestines for a long time and will produce many toxins and carcinogens. These toxins and carcinogens not only easily cause people to suffer from gastrointestinal tract disease , and also damage the central nervous system nerve The system makes people age.

　　2. Food restriction can prevent and delay the deterioration of brain function.

　　Scientific research shows that there is a substance called "fibroblast growth factor" in the human brain. After a person is full, the amount of this substance will increase tens of thousands of times compared to when food is restricted. This growth factor will increase the size of fat cells and capillary endothelial cells, promote arteriosclerosis, cause insufficient blood oxygen supply to the cerebral cortex, and ultimately lead to brain atrophy and brain function degradation, thereby affecting human life span.

　　3. Food restriction can prevent premature aging.

　　About 2% of the oxygen inhaled when people breathe is catalyzed by oxidase to form reactive oxygen species (free radicals). Reactive oxygen species are extremely harmful substances to the human body. They can cause cell damage and hardening of arteries, thereby causing diseases and promoting aging. Scientific experiments have proven that the more energy the human body consumes, the more reactive oxygen species it produces and the faster the aging process. From this, it can be seen that food restriction can delay aging and extend life span.

　　4. Food restriction can reduce the incidence of "rich diseases".

　　In recent years, due to the great improvement of living standards, more and more people are suffering from "diseases of wealth", such as hypertension, hyperlipidemia, coronary heart disease , cerebral thrombosis, diabetes, gout, etc., for people healthy brought serious harm to lives. The occurrence of these diseases is closely related to excess nutrition in the body. Food restriction can control energy intake, avoid overnutrition, and reduce the incidence of "rich diseases".