In a healthy human body, where there are microorganisms, there are no microorganisms.

Scientists say that there are hundreds of billions of bacteria in the human body, which have a far-reaching impact on human health, physique and even emotional changes. These bacteria form an ecosystem in the human body, which affects the physical condition of the human body in many cases, which is not explained by environmental factors and human genes, such as obesity, cancer, asthma and even autism, depression and so on. It can be said that bacteria are everywhere in the human body, whether in the mouth, lungs, skin or intestines. According to the preliminary study of HMP project, the human body carries at least 6.5438+0 million different kinds of bacteria, and its weight is about 5 pounds (about 2.25 kilograms). Studies have shown that babies' intestinal flora comes from their mothers and is usually implanted into their birth canal during childbirth. Caesarean babies usually carry fewer and different kinds of bacteria, which explains why Caesarean babies are more likely to suffer from asthma, obesity and type A diabetes. At the same time, the advantage of breast-feeding over milk powder is that breast-feeding can transfer some maternal bacteria to infants, which is helpful to the development of infants' immune system. Second, the role of microorganisms in the human body: experts say that microorganisms in the human body do not pass by in a hurry. They are active in the metabolic process of human body. As creatures, we must take them seriously now, just as we must take the ecosystems in forests or water systems seriously. Scientists have long known that the human body coexists peacefully with trillions of microorganisms, and they call this microbial community "microbial community". So far, scientists have mainly studied those who can guide. ...