Will skin care products be absorbed once?
Whether skin care products can be absorbed or not has always been a problem that plagues everyone. Many people often get the illusion that the skin feels slippery and absorbed, but it is not.
PART1, US experts say that human skin can not absorb cosmetic nutrition
According to the US "Qiao Bao" report: most of the brands of cosmetics sold in the market claim that they contain vitamins and other special nutrients, which can make the skin absorb and make the skin brighter - this is a lie.
When many cosmetics are advertised, they tend to emphasize the lack of nutrients in the skin, and cosmetics manufacturers spare no effort to add various nutrients to the products. Can these nutritional additives really bring nutrition to the skin?
The skin is the outermost protective barrier of the human body. It has a multi-layered structure. The outermost part is the stratum corneum composed of dead keratinocytes. This layer is thick and compact, which can effectively prevent the invasion of bacteria and harmful chemicals. There is also a lipid film on the surface of the stratum corneum, which makes the skin smooth, shiny and prevents evaporation of water in the body. The presence of the stratum corneum and lipid film makes the skin impervious.
This natural protective mechanism of human skin allows only a small amount of water and fat-soluble substances to pass through. Many water-soluble substances in cosmetics, such as vitamin C, macromolecular proteins, etc., are not absorbed through the stratum corneum or hair follicle sebaceous glands.
Medical research shows that the nutrients necessary for skin tissue metabolism, such as sugar, fat, protein, electrolytes, vitamins and water, can only come from the blood supply of dermal small blood vessels, and any nutrients that enter the body through the skin cannot be cells. Direct use. Even if the various nutrients in cosmetics and skin care products can partially penetrate into the skin, at most, it is a superficial effect and a covering effect. What really works is the lipid component, which adds a lipid film to the skin and can moisturize. Anti-dry.
PART2, the skin is not a sponge coating what can absorb what
The skin is not a sponge. It must be firm to ensure that it is not easily invaded by foreign bodies. Therefore, there are six or seven layers of cells on the surface of the skin to form the stratum corneum, followed by a granular layer, a transparent layer, a spinous layer, and a basal layer. Each layer has several layers of cells. The need for physical safety.
However, this does not mean that any nutrients can not penetrate the skin protective layer. In fact, oil-soluble ingredients in skin care products are more easily absorbed. For example, vitamins A and E are oil-soluble, which is easier to absorb than B and C. This is related to the structure of human cell membranes - the cell membrane is composed of proteins and lipids, and the lipids are more likely to become absorption channels. Mineral oil is not absorbed, but the oil-soluble active ingredients are still easily absorbed. So don't have skin care products that feel very oily, it is a mistake that is difficult to absorb.
Although the skin care products of water quality are more likely to be easily absorbed, it is only because the water is easy to evaporate and the skin feels less, so it is mistaken for absorption.
PART3, some skin care products are destined to not absorb
Although the process of absorption of skin care products is a bit tortuous, there are always a few types that are particularly relaxing, just stay on the surface and don't have to work hard to squeeze into the bottom of the skin.
1, clean
As long as the dirt and grease on the surface of the skin can be cleaned off, the active agent, the frosting component, the tear-off adhesive, and the like do not need to be absorbed.
2, moisturizing and moisturizing
The so-called moisturizing is to make the skin surface smoother, and penetrate into the keratinocytes to form a film to prevent water loss, the skin also looks more translucent, these components do not need to be absorbed into the skin (cell).
Moisturizing ingredients such as glycerin or other oils and fats only need to stay on the surface of the skin to absorb the moisture in the air and the dermis to form an aqueous film, so that the epidermis is moisturized and moist, without being absorbed, and does not require a "straight dermis layer".
3, sunscreen ingredients
No matter whether it is chemical or physical sunscreen ingredients, it does not need to be absorbed, as long as it absorbs or blocks ultraviolet rays on the surface of the skin. If the chemical sunscreen is absorbed, there will be a serious reaction. The physical sunscreen ingredients, zinc oxide and titanium dioxide, are also not absorbed at all.
4, cover the skin
This is one of the main functions of the cream and BB cream. Since it is necessary to cover the skin, it is naturally not necessary to be absorbed, whether it is titanium dioxide, talcum powder or other powders. >>>The magic of broccoli
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