A little Bit About Physiology
The close relationship of the skin with all organs and systems was laid still in the embryonic period. All tissues and organ systems develop from the three embryonic layers. The human body is formed as a single integrated system, in which all interconnected.
Hundreds of years ago there was noticed the influence on the functions of the body by mechanical stimulation of certain points on the skin. There is a link between the skin and internal organs – the state of internal organs is reflected in certain areas of the skin by increased pain and temperature sensitivity.
Mutual influence of the state of the skin and condition of internal organs and systems – a manifestation of “the principle of feedback” that is necessary for life and adaptation of the organism.
The skin is in constant interaction with the external environment. In its “assigned” a lot of different functions: the protective barrier and Immune response, excretion and absorption, water balance, sensory reception, thermoregulatory, et cetera. The skin is actively involved in the general metabolism in the body, produces the principal amount of vitamin D, and protective pigment – melanin.
Numerous receptors located are in the skin, signaling any change in the environment, creating an adequate response. As a major protective barrier for the body, the skin suffers from more exposure to aggressive environments than other organs and systems, that factor leads to its premature aging. The skin needs constant care – cleansing, nutrition, hydration and protection.
The skin separates the internal environment from the external environment, protects against negative external influences. On the surface barrier (horny layer of the skin) there is a hydrolipid film (protective mantle).
The barrier functions are performed by several layers of the stratum corneum cells connected by an intercellular lipid – lipid barrier.
Cosmetics should restore the protective function of the skin
The lipid barrier is impermeable to water and plays a major role in retaining skin moisture and protecting against negative environmental influences.
This protective barrier is always under attack from the outside: sun, wind, temperature changes, the damaging effects of free radicals, bacteria, viruses and fungi. Disruption of the lipid barrier leads to dehydration of the skin, dryness and flaking, the appearance of allergic and infectious diseases, premature aging.
Damaging effects on the lipid barrier may be caused by cosmetics – if it contains an aggressive components.
In cosmetic and skin care products the most important is the effect on the intercellular lipids and skin barrier function and not the “speed” of absorption. Cosmetics are actively involved in the process on the surface layers of the skin. Depending on the ingredients cosmetics can be harmful or helpful.
Corneotherapy demonstrate the need to protect and restore the horny layer of the skin and to prevent complications caused by its destruction. Because the epidermis is able to break down lipids appearing in cosmetics and use the resulting fragments to restore the lipid barrier of the skin, it is necessary to deliver the skin its necessary material from the “outside and within”.
The skin should receive a sufficient amount of lipids, antioxidants, vitamins, amino acids, minerals which help the skin stay hydrated, healthy and beautiful.
Cosmetics should restore and maintain the protective function of the skin, it should not contain components that has the adverse effect.