How did the skin moisten skin? moistens skin

How did the skin moisten skin? moistens skin
How did the skin moisten skin?
1950's, be said to be in the milestone of development of skin care product, because scientific research of the skin verified what kept the skin flexible was the water content in the cuticle at that time, and people were regarded as the oil assuming as a matter of course before, this discovery offered the theoretical foundation for development of the new products. Under the guidance of this theory, a lot of new raw materials come into operation, a lot of new crafts have been popularized. Up to now, though moistening skin product to be a feast for the eyes at the market, leave these principle.
The cuticle is formed by angle protein cell of the dead activity. Horn protein cell 30 micron wide, 0.8 micron thick, take the form of hexagon, they link up closely, interlock while being range upon range of, about 10-20 layers form the cuticle, it is about 10-15 microns thick. Extraellular space of protein of angle is probably full of fat materials of one layer of form structure among them between 0.02-0.2 microns. The cell membrane of the cells of protein of angle in the cuticle, combination water amount of the ground substance among cell content thing and cell, have determined the flexibility of the skin.
On this basis, people reveal three kinds of following materials to the important function that keeps the skin elastic gradually: First, water; Keep water soluble material of moisture in the skin ' play a key role among them lactate and pyrrole alkane ketone hydroxy sour -PCA) . People call that NMF (NATURALMOISTURIZINGFACTOR) ,Natural factor of moistening skin. Contain hydroxyls in their molecular structure, these hydroxyls can catch the moisture son as hand, thus leave the moisture son in cuticle; Third, lipid in the skin, they cover thin unfertile land on the skin surface, prevent the moisture from evaporating, do not let the moisture son escape to the surrounding environment, still can moisten skin and exert an influence to the skin through influencing the adhesion of cuticle cells. Equilibrium relations among content and they in the skin such as water, NMF, lipid exert a tremendous influence (this is equilibrium of moistening skin which a lot of producers propagate) to the skin .
Under the normal situation, because skin cuticle function and protective screen function of absorbing water, the oil that sweat gland and sebaceous gland secretes is covered on function, can keep the content of the moisture in the cuticle in 10-20%, and difficult to be lost. When water - NMF - lipid is in the equilibrium state, the skin is smooth and delicate, whippy, but under some conditions, for example in the cold and dry environment, thin sebaceous has already lost control of the radiation of the moisture; Wash the face with alkaline relatively loud detergent often, wash sebaceous clean too; Because of the reason of disease, skin can't produce the abundant moistening skin material, these situations will all balance and moisten skin the organization is destroyed, cause the skin to be dry and coarse, will even produce the scurf.

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