The use of fast whitening cosmetics can make the skin white for a short time, which is due to the heavy metal components of whitening cosmetics. On the one hand, heavy metal ions such as lead and mercury can prevent the formation of melanin and whiten the skin. On the other hand, these heavy metal ions will also peel off the top layer of the skin, and the underlying skin will be exposed, so the skin It looks white and tender.
The skin color of a person is mainly determined by the content of melanin in the skin. Therefore, the less the content of melanin, the more white the skin will appear. The skin of the human body is divided into 4 layers. The normal metabolic process is about 20 days, and the stratum corneum will be self-renewed. Therefore, from a medical point of view, if you can achieve a fast whitening effect within 20 days, it must contain certain pharmaceutical ingredients that are prohibited by cosmetics. Whitening and spotting can only be changed slowly and gradually. The "fast whitening and spotting" for hours or days is harmful to human health.
Emphasis on quick-acting whitening products often causes irreversible damage to the skin. Mercury damage is the most typical example: cosmetics containing excessive amounts of mercury can make the skin white and delicate in a short period of time, but if it is stopped, the skin will be Will return to the previous state, and even worse than before, so it is difficult to stop once used. In order to maintain a good whitening state for a long time, many people will use it for a long time. They do not know that these seemingly magical chemical components have a strong light absorption effect, which will cause abnormal pigmentation on the skin and deepen the original pigmentation. It may also cause skin peeling layer by layer; and because of its peeling effect on the stratum corneum of the skin, the skin becomes extremely sensitive, and the sun will immediately become a red rash, and it is particularly easy to dry.
Heavy metal components (especially mercury and lead) that can quickly whiten the skin not only cause harm to the skin, but also cause long-term absorption and deposition in the human body, which can also cause chronic poisoning. Severe cases can cause damage to human bones, teeth, liver and kidney functions as well as nerves, with serious consequences.
Although the higher the content of melanin in the skin, the darker the skin tone will appear, but from the perspective of anti-cancer and skin care, the higher the content of melanin, the less likely the skin disease will be. Because it absorbs most of the ultraviolet rays, it greatly reduces the transmission of UVA and UVB, thereby protecting the skin from the biological damage caused by ultraviolet and visible light, protecting and alleviating the acute or chronic inflammation of the skin caused by sunlight. Sunburn, aging and cancer caused by sunlight.
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