Why do you want to whiten and blemish first?

Skin color

The skin color of a person is mainly determined by two factors: 1. The content of various pigments in the skin; 2. The thickness of the epidermis and the scattering of light on the surface of the skin. Only by starting with these two factors can the skin be white, delicate and flawless.

●The content of various pigments in the skin

The skin color is determined by the content of melanin, melanin, carotenoids and carotene in the skin. Among them, the decisive role is the level of melanin. Black people have the highest melanin content and the strongest resistance to ultraviolet light; Caucasians have the lowest melanin content and the weakest UV resistance, and the incidence of Caucasian skin cancer is much higher than that of black and yellow. The yellow species live between the two. The distribution of melanin inside the skin largely determines the quality of a person's skin.

In addition, oxyhemoglobin in the capillaries in the skin, reduced hemoglobin in the vein, and collagen in the dermis (grey yellow) also have an effect on the skin tone. The rosy, white complexion is the skin condition that many small partners dream of. In fact, most women have had this skin color during their teenage years, but with age, skin care is not good, and good skin color is slowly disappearing.

● skin thickness and light scattering

We see a person's skin color, which is actually the result of light reflection. When light hits the skin, some will penetrate the stratum corneum and enter the inside of the skin, and some will be reflected. If the skin is fine and smooth, there are fewer bumps and wrinkles. At this time, more light is reflected and the skin looks whiter. On the contrary, the skin is rough, uneven, wrinkles, stains are serious, the amount of facial oil is large, the reflected light is less, the skin looks dull, dull, and the skin color is worse.

About melanin

For melanin, everyone will not be unfamiliar, and all articles about whitening will mention her. Melanin is produced by melanocytes distributed in the eyes, ears, and skin. Regarding the formation mechanism of melanin, it will not be analyzed in detail. We only talk about the role and formation of melanin.

●The role of melanin

When you hear the name melanin, most of your friends will have negative associations. In fact, melanin is vital to the human body. The main role of melanin is to absorb ultraviolet light. We know that ultraviolet light is an electromagnetic wave that carries energy. When it enters the human body, it generates a lot of free radicals, disrupts the normal metabolism of the human body, attacks normal tissue cells, and causes great harm to the human body. At this time, melanin comes forward and actively absorbs the ultraviolet rays entering the skin, protects other tissue cells, and maintains the normal physiological functions of the human body.

Skin tissue works normally and requires melanin protection. White human skin has less melanin content and lacks the necessary protection. The incidence of skin cancer is much higher than that of black and yellow races.

●The cause of melanin formation

There are many reasons for stimulating melanin to release melanin. The main reason is sunlight. The ultraviolet rays in the sun can penetrate the stratum corneum and enter the skin. The melanocytes in the skin release a lot of melanin, absorb ultraviolet rays and protect the skin. At the same time, the melanin content of the skin increases and the complexion turns black. If local melanin accumulates, a stain is produced. Most of the initial melanin is mainly in the epidermis. As long as measures are taken in time, as the epidermal cells metabolize, melanin will shed with the aging keratinocytes and be excluded from the body. If melanin enters the dermis, it is very troublesome to metabolize.

Local skin inflammation also stimulates melanocytes to produce melanin, which leads to local pigmentation. This is the case when the acne is not properly treated and left with acne marks.

Oral medications, such as birth control pills and hormone ointment hormones, may also stimulate the production of melanin in large quantities and produce pigmentation. In addition, 壬辰, adrenal hyperfunction, may also cause pigmentation. This is the reason why it is prone to long spots during pregnancy.

Why do you want to whiten your skin and white spots?

From the above analysis we know that melanin plays an important protective role in skin tissue. However, from an aesthetic point of view, melanin is not so popular. Therefore, to some extent, the process of whitening and blemishes is the process of destroying the body's protective organization. It is not difficult to understand why products with good whitening and good spotting will be irritating.

When we use external methods to forcibly block melanin formation, break down melanin, and accelerate the already formed melanin metabolism. Without melanin, who will protect our skin tissue from UV rays? At this time, it is necessary to add a protective film to the skin to replace the effect of melanin, to reflect or absorb the ultraviolet rays, to prevent ultraviolet rays from entering the skin to destroy, the importance of sun protection is self-evident.

Moreover, if you do not do sunscreen, the human body can not let the ultraviolet light destroy, even if there are external whitening and blemishes, the melanin will continue to form, the whitening and blemish effect will be greatly reduced, and the expected effect will not be achieved. The spots will even increase.

In summary, the color of human skin has a great relationship with melanin. Skin tissue requires melanin protection. In order to whiten and blemish, you must first do a good job of sun protection. Only when sunscreen is done, it is possible to achieve good results. Without sunscreen as a foundation, any whitening or blemish products will not have a good effect. Sunscreen can also prevent skin aging. For this, I will write a detailed analysis in the future.