on skin care, skin absorption of cosmetic ingredients has been my study.The outermost layer of skin is the body's protective barrier, a multi-organizational form, the top is composed of dead cells from the stratum corneum, stratum corneum solid, tight, and can effectively prevent the bacteria, the intrusion of harmful chemicals.The surface of the stratum corneum, a layer of cells from the deep fatty acids, amino acids and other substances formed film.So the skin has not permeable, it can either prevent the water soaked, you can also prevent the loss of body water.Under normal circumstances, the nutritional additives in cosmetics can not enter the skin, especially the nutritional skin care products like cream.
A.Proliferation of nutrients absorbed by the stratum corneum
formed on the surface layer of the skin oil film, can make the skin soft and reduce water loss, nutrition, the nutritional content of cream, can not be immersed in the stratum corneum, it can not be absorbed through the skin.Even the absorption of the stratum corneum diffusion is selective.In general additive diffusion in the skin there are two ways:
1.Soluble substances through the skin penetration of the interval between cells.
2.Water-soluble substances, mainly through the hair follicles, sebaceous glands, glands and other juice places greater penetration of the gap, but over time, due to the skin surface area far greater than the glands and other auxiliary organ of the absorption area, water-soluble substance or in the epidermis mainly transdermal absorption.
B.chemicals penetrate the skin absorption characteristics
1.with oil and water soluble substances with the most easily absorbed
2.fat-soluble substances, followed by
3.water-soluble material in the most difficult to absorb various nutrients
Cosmetics Even if some substance in the skin penetration, at best, only lead to some"superficial effect."
C.rely way to get the nutritional skin
epidermal growth, metabolism, mainly by the nutritional needs leather layer to provide nutrition.Fibrous connective tissue epidermis, the distribution of numerous capillaries and nerve endings, the capillary wall is very thin and have a certain permeability, epidermal cells need nutrients from the capillary penetration of the amino acid , sugar, etc., that is, nutrition is the blood from the dermis to obtain.
D.As long as the skin can not absorb, will become a burden
skin depends mainly on the internal access to the necessary nutrients, rather than the use of cosmetics through the skin surface to obtain, so we choose a variety of nutritional cosmetics should be taken with caution.
study shows that a large number of skin care products in the addition of nutrients, no matter what the essence of what nutrients, as long as the skin can not absorb, are a burden.Excess nutrients skin cosmetics, it is caused by"skin oxidation," one of the important reasons, the skin will appear premature aging, degradation, metabolism, the skin becomes dry, sensitive, wrinkles, pigmentation, acne and so on.
E.wrinkle cream nutrition, but will accelerate the aging of skin
Novosibirsk recently Crops Research Institute for the experts found that cells About 90% of the anti-wrinkle cream of excess nutrients, not only can not play a role in delaying aging, but will accelerate the skin aging.
The institute also a unique set of analysis programs, the ingredients in cosmetics, including the world-famous brand products, found that vitamins, fats and amino acids have been seriously overweight, which is extremely harmful to the skin will curb its division and generation of new cells.Some experts pointed out that the long-term use up to 11% fat content anti-wrinkle cream, it will accelerate the aging of skin cells, and we usually use cosmetics fat content averages 40%, while excess vitamin can also cause damage to the skin.
F.skin can not absorb nutrients, has become a hotbed of growth and reproduction of parasitic bacteria
skin surface bacteria growth and reproduction process requires a lot of vitamins, protein, nutrients and biological cells, which also is the main component of nutritional cosmetics.If the nutrient composition of cosmetic products can not be completely absorbed, then it will become a hotbed of growth and reproduction of parasitic bacteria, and a lot of bacteria can lead to skin infections
G.How to choose and use the nutrition cosmetics
1.in the choice of cosmetics, a choice of liquid to gel-based cosmetics, or the imitation of human tissue fluid bionic skin care products.If you need to use oil cosmetics, to choose products with low oil content.
2.oily skin, acne skin, the best use of nutritional cosmetics cautious about the option of a bactericidal anti-inflammatory effect of the product.
3.Regular physical exercise and make facial massage to enhance blood circulation and expansion of dermal blood vessels, thereby enhancing the delivery of nutrients to the skin.
4.with the ordinary method of washing or mask the surface to eliminate dirt and dead skin cells.
text: Photo courtesy of Hong north: KIKI technical guidance: Hi Yen U.S.Gallery
