What is the skin?

Our skin, is a large number of microorganisms inhabiting and composed of ecosystems, a large part of the barrier function of the skin is to rely on these microorganisms to complete, that is, the bacterial flora, according to statistics, the human body skin per square centimeter, that is, the size of the fingernail on the skin, there are about one million microorganisms bacteria. After a long process of biological evolution, the normal jun group and the human body in a symbiotic state, they and the body has formed interdependence, mutual coordination and mutual constraints of the unity of this unity reflects the dynamic balance of the human micro-ecology, the balance is healthy, imbalance is disease. Therefore, the balanced state of microorganisms is vital to our health, they are the first barrier to the human body.