As in the whole body – a lot, but it is unevenly distributed… The uppermost layer (epidermis) contains only 10-13% water. BUT basic moisture supply stored in the next layer – the dermis. It consists of as much as 80% water. Rather, it should be. But in some cases, for example, after a long exposure to the sun, there is not enough water, then problems arise: the skin loses its elasticity and ages faster.
Water enters the epidermis from the inside organism, and not from the external environment: moving from the dermis outward, “on the way” it moisturizes the epidermis. The upper layer of the epidermis contains lipid barrier, which does not allow moisture to evaporate and has a protective function.
How do moisturizers work?
Many people think that moisturizers literally “deliver” water to the skin. In fact, more often than not they act by rebuilding the water-lipid cover from the inside and strengthening the top layer epidermis. That is, they help the skin retain the moisture it already has.
Therefore, first of all, it is worth taking care that your body as a whole did not suffer from dehydration… And those same notorious 1,5 liters of water must be drunk, even if you have already purchased moisturizers for your entire salary.
How is moisture stored?
It cannot be said that on creation protective barrier the useful functions of a moisturizer are at an end. But it would be wrong to exaggerate its miraculous properties either. In addition to “strengthening the boundaries” of the epidermis, cosmetics can make “minor repairs” natural barrier.
Many cosmetologists consider the main thing in the matter of moisturizing. stimulating the synthesis of hyaluronic acid and collagen… Distributed over the surface of the skin, the acid forms the thinnest film that actively absorbs moisture from the air. This contributes to an increase in the water content in the upper layer, and also creates an additional moisture effect that helps reduce water evaporation from the surface of the skin. Collagen fibers are known to that maintains its elasticity.