Skin is the human body's natural barrier and purifier. On the one hand, the skin has a protective effect on the body in all aspects; on the other hand, the skin has a certain penetration and absorption capacity. Some cosmetic ingredients can penetrate into the dermis through the epidermis and be absorbed by the dermis, affecting the whole body. This article will explain to you the skin's permeability and absorption principles.
Principle of skin penetration and absorption of cosmetics processing ingredients
Skin penetration of cosmetics processing ingredients is the main channel for the skin to absorb small molecular substances, mainly through three channels ： Cuticle, hair follicle sebaceous gland and sweat duct opening. The stratum corneum is an important way for the skin to absorb. Its physical properties are quite stable. It forms a complete semi-permeable membrane on the surface of the skin. Under certain conditions, water can freely pass through the cell membrane and enter the cell. Studies have shown that there are a small number of heavy metals and chemical substances of that penetrate into the dermis through the side walls of the hair follicle sebaceous glands and sweat ducts.
Principle of skin penetration and absorption of cosmetic processing ingredients
Generally speaking, the various types of cosmetics that can be touched by human skin are usually very It is difficult to be directly absorbed by the skin through the normal epidermis. There are usually the following ways for nutrients to enter the skin:
1, Soften the stratum corneum, penetrate into the stratum corneum cells through the stratum corneum cell membrane, and then may regenerate Enter the dermis layer through the epidermis ; a small amount of macromolecules and water-soluble substances that are not easily permeable can pass through the skin hair follicles, enter the deep dermis of the skin through the sebaceous glands and hair follicle duct walls, and then diffuse from the dermis to all places; some ultra-fine molecules Substances penetrate into the dermis through the intercellular space of the stratum corneum. It can be seen that the stratum corneum is an important part of skin penetration and absorption. The biological characteristics of the stratum corneum are directly related to the absorption performance of the skin.
The principle of skin penetration and absorption of cosmetic processing ingredients
2, The thickness of the stratum corneum in different parts of the body is different, which directly affects the skin Degree of absorption. For example, the stratum corneum of the palms and soles is thicker, and the absorption effect is weak; the stratum corneum of the skin of infants and children is thin, and the absorption effect is stronger than that of adults; while the mucosal tissue has no stratum corneum, the absorption effect is stronger.
Understand the absorption principle of the skin. Hydro-Bio will be able to make targeted formulation adjustments in the research and development of skin care products, so as to solve the problem that skin care products are difficult to absorb; although heavy metals can be absorbed by the skin The amount is not large, but it is safest not to add.
