The black mud that is usually rubbed out in the bath is professionally called sebum film, which looks disgusting and really indispensable. The black mud that is usually wiped out by bathing is professionally called sebum membrane, which contains viruses, dust, bacteria and metabolites, and is a multi-component fusion. In order to find out the composition and structure of these black mud, experts in the industry also observed it under the microscope. From the actual situation, the black mud forms a dense black substance under the microscope, just like a black mud mass composed of black bugs, which is disgusting.
In particular, most of the substances in this black mud are dirty, even including the bodies of many dead bacteria. Although it seems that this kind of black mud is really disgusting and permeates people, it is really indispensable to human beings, and it has a great connection with human health.
Sebum membrane has many functions, and once it is abnormal, it will lead to dry and dull skin. Sebum membrane has many functions. When the human body is overheated, the skin will automatically emit heat. In this process, the sebum membrane can play a role in locking water and cooling the skin as soon as possible. When water evaporates, it also takes away the heat on the surface of human skin. At this time, the sebum membrane can also play a role in keeping the body at a constant temperature, and achieve the effect of obviously regulating the temperature for the body. In addition, when the human body is dehydrated by excessive evaporation, the sebum film can also play a good role in replenishing water. Because there are many substances on the sebum membrane, these substances can ensure that some water remains inside when the water on the surface of human skin evaporates, so it can play the role of hydrating the skin on the surface of human body.
Of course, even if the sebum membrane can replenish water to the surface skin, human beings should drink more water from the basic source to avoid excessive evaporation of water. We should also know that once the sebum membrane has abnormal regulatory dysfunction, it will lead to dry skin and need to solve the problem to alleviate it.
Sebum membrane can kill bacteria and viruses on the skin surface and effectively awaken the skin's immune system. In addition to the above functions, sebum film can also kill bacteria and viruses on the surface of human skin. Even if bacteria and viruses stay on the skin surface, sebum membrane can wake up the skin's immune system in time. Further, the skin surface is permeated with free fatty acid substances, which plays a role in sterilization and disinfection. It's just that free fatty acids exist in human fat for a long time, and their secretion will be different according to the strength of each person's immune system.
Including free fatty acids can also effectively inhibit the growth of microorganisms on the skin surface, that is, avoid the problem of moldy skin surface and ensure the health of the body. Just like this, if you look carefully, you will find that a small number of people in life will not get moldy skin even if they don't take a bath all the year round.
In short, the black mud that is usually wiped off in the bath is the sebum film, which looks disgusting on the surface, but it is closely related to human skin health. You may rub off some sebum membranes when you take a bath, but most of these sebum membranes are dead skin, which has no effect on skin health. Unless you rub your skin hard, it will become an alarm signal initiated by the skin to people!