What to do for skin whitening
Facial skin color is composed of general biotin: melanin (brown), oxidized hemoglobin (red), reduced hemoglobin (blue), and carotene (yellow).
The first three are endogenous pigments and the latter are exogenous pigments.
It is the melanin content that determines the race white and black.
Melanin is produced by melanocytes and then transferred to epidermal keratinocytes under the action of tyrosinase. The color of the skin is related to the ability of melanin produced by each melanocyte and the number of melanocytes., And the speed of melanin transfection to keratinocytes.
From the perspective of skin whitening, people always think that the less the amount of melanin, the better, and for people who work in the sun, melanin is indispensable for cancer prevention and health care.
Melanin can absorb a large amount of ultraviolet light, greatly reducing the transmission of ultraviolet UVA and UVB, thereby protecting the biological damage caused by ultraviolet and visible light irradiation of the skin, protecting and reducing the skin’s acute or chronic inflammation caused by sunlight, and preventing the skin caused by sunlightSunburn, aging and canceration.
Sunburn is most likely to occur, and long-term sun exposure is also prone to skin cancer, plus basal cell carcinoma, squamous cell carcinoma, and melanoma, while black people rarely develop skin cancer.
In addition, melanin can also protect the decomposition of folic acid and similar important substances into the light.
Therefore, natural dark skin is not a bad thing, so don’t deliberately pursue whitening artificially.
For the dark skin caused by the day after tomorrow, people have to deal with it properly.
As ultraviolet light promotes melanocyte division, the most important factor in accelerating melanin synthesis.
Therefore, avoiding light and sun protection is the most important measure to reduce melanin formation.
At present, there are many sunscreen cosmetics on the market, but many people find that even if they are actively applied, the effect of preventing the formation of skin pigmentation is not ideal. In this regard, sunscreen cosmetics may be used improperly.
The sun protection effect of cosmetics is generally expressed by the SPF value. The SPF value indicates that the better the sun protection effect, but the more sun protection additives are used, the greater the irritation to the skin, and some of the sun protection additives are light-sensitive substances.After easy to cause skin pigmentation.
So, for general daily protection, replace the SPF value by 10?
20 is enough, such as SPF changed 15 sunscreen cosmetics, its sun protection time is about more than an hour, so if you go out more than 2 hours, it should be reused once to ensure the consistency of sun protection.
At the same time, because almost all sunscreen cosmetics only target UVB in ultraviolet rays, the protection of UVA is ignored.
The original purpose of producing sunscreen products was to prevent the damage to the skin caused by UVB, which is carcinogenic in ultraviolet rays. SPF stands for the actual sunscreen effect of this sunscreen product on UVB.
Recently, scientists have discovered that UVA is also an important factor causing facial stains.
The characteristics of UVA destruction include: UVA dose in sunlight is 100 times larger than UVB?
l000 times; UVA has a strong carrying capacity, 30%?
50% directly to the dermal layer; at the same time, the UVA irradiation season, the influence of clouds, glass, water; and UVA can enhance the damage of UVB, and the damage has a cumulative effect.
Therefore, if you want to whiten your skin, you must not only prevent UVB damage, but also UVA damage.
At present, some cosmetics companies have started research and development and started to introduce cosmetics that can prevent both UVB and UVA to the market.
However, there is currently no unified standard for UVA protection, and its effects need to be further observed.
In addition to applying sunscreen cosmetics, care should be taken to avoid excessive sun exposure. You should pay attention to it from a young age and pay attention every day. You do not need to avoid light when you are out.
Ordinary fabrics, whether natural or synthetic, have sufficient protection against ultraviolet radiation.
Therefore, when going out, holding umbrellas, wearing hats, sunglasses, and long-sleeved clothes are simple and effective protective measures.
Maybe, many people want to have white skin over white, it will look more beautiful.
In addition to applying sunscreen and taking sun protection measures, can the whitening effect be penetrated by applying a variety of whitening and whitening products on the market today?
At present, the internationally recognized effective whitening methods are: 1.
By chemical bleaching, whitening effect can be achieved; 2. Overcoating 2%?
5% hydrogen radical cream can whiten; 3, acid used by dermatologists, cosmeticians?
Peel off the outer layer of the skin to reveal new delicate skin.
Professionals can make mild, moderate and severe peeling of the face depending on the acid used.
For moderate peeling, glycolic acid is usually used; the other is trichloroacetic acid sulfate, which is also used for moderate peeling; carbolic acid is the strongest acid and can be used for heavy peeling.
The above three types of peeling treatments can leave the skin at different intervals?
? Brightening and whitening effect over time.
Scrubbing the skin with a scrub may also have some of these benefits, but scrubs are not available for all skin types.
What is the whitening effect of whitening products on the market?
Professional opinion is based on the ingredients contained in the product.
If it is retinoic acid of western medicine, it will have a whitening effect.
Because medically speaking, retinoic acid can reduce fine wrinkles and skin surface pigments, change and stimulate cell regeneration, make collagen, and promote blood circulation in the dermis.
And because it also indirectly reduces melanin production by affecting tyrosinase metabolism, resulting in whitening effect.
There are also some nourishing and moisturizing whitening creams, if they contain glycolic acid extracted from fruits or lactic acid extracted from milk, because they are all mild acid products, mainly extracted from natural substances, which can reduce fine lines on the skin surfaceMakes skin look smoother and brighter.
Both substances have the effect of making the skin white and tender.
However, consumers may have some degree of asynchronousness when using them, such as?
Discomfort can also cause the skin to become overly sensitive to light.
Therefore, the EU countries have restricted the use of fruit acid products?
When using these two products, get professional guidance.
Professionals believe that, in fact, many whitening products have not yet reached the whitening effect at all, but just improve the effectiveness of beautification, covering, and insulation.
Therefore, consumers are suspected of being confused by some so-called whitening cosmetics, and they should recognize the ingredients they contain and choose.