1. Why should kojic acid be added with this ingredient? In human skin, tyrosine undergoes complex oxidation and polymerization with oxygen free radicals under the catalysis of tyrosinase, and finally melanin is synthesized. Kojic acid can inhibit the synthesis of tyrosinase, so it can strongly inhibit the formation of skin melanin. Kojic acid has been mixed into make-up water, facial mask, emulsion and skin cream to make whitening cosmetics, which can effectively treat freckles, senile plaques, pigmentation and acne. Add safely? 20ug/ml kojic acid can inhibit the activities of various tyrosinases (or polyphenol oxidase PPO) by 70 ~ 80%, and the general addition amount in cosmetics is 0.5 ~ 2.0%. Is it safe? Generally extracted from filamentous fungi such as Penicillium and Aspergillus, it contains certain toxicity. Highly allergic, may produce irritating contact dermatitis and leukoplakia. What common skin care products contain this ingredient? 2. Why should arbutin add this ingredient? Arbutin is a whitening ingredient, which can reduce the production of melanin by inhibiting the activity of tyrosinase, an enzyme that produces melanin. Add safely? Only a high concentration of arbutin can be sensitized, but the upper limit of the added concentration in cosmetics is 7%, so there is no so-called photosensitivity. Is it safe? This ingredient has a quick whitening effect, but it is irritating to the skin. It is not suitable for whitening for a long time, and it is necessary to stop replacing mild products after a period of use. What common skin care products contain this ingredient? 3. why should I supplement vitamin C? VC is a natural antioxidant, which is used to prevent and treat skin sunburn. Its functions are: first, to reduce dark melanin to light melanin, and second, to inhibit the production of melanin by intermediates. The human body itself cannot produce VC, and it must be ingested from the outside. In cosmetics, VC can reduce the multi-step melanin synthesis process such as dopaquinone by interacting with copper ions at the active site of tyrosinase, thus interfering with the production of melanin, which has a good whitening and freckle removing effect. At the same time, it also has anti-inflammatory effect. Add safely? Because of the poor stability of VC, derivatives of VC, such as sodium phosphate and magnesium phosphate, aa2g and VC-IP, are commonly used in cosmetics. Is it safe? Vitamin C is safe, but its stability is poor. Without protection, it will soon lose its activity. It is easy to oxidize to yellow in the air, and vitamin C derivatives are often used instead. What common skin care products contain this ingredient? 4. Why do you want to add this ingredient to fruit acid? Alpha hydroxy acid (AHA) is a variety of organic acids extracted from fruits, and it is an effective component in many natural fruits or yogurts. It contains grape acid, malic acid, citrus acid and lactic acid. Because most of them are extracted from fruits, they are called fruit acids. Taking lactic acid as an example, it can be divided into L- lactic acid and D- lactic acid according to different structures. As a natural moisturizing factor, L- lactic acid exists in human skin, so its irritation is less than other fruit acids. Commonly used in mild products such as eye cream, it can effectively remove fine lines and wrinkles. Add safely? The content of L- lactic acid in cosmetics is about 5%. Only low concentration fruit acid below 3% is allowed in whitening and freckle removing products; Medium concentration fruit acid is used for whitening and removing spots; More than 20% of high-concentration fruit acid can only be changed under the guidance of professionals. Is it safe? Since the appearance of fruit acid, the debate about its safety has never stopped. Many people are allergic after using fruit acid products. It is recognized that the skin will become more sensitive to ultraviolet rays after using fruit acid. What common skin care products contain this ingredient? 5. Why does nicotinamide add this ingredient? Nicotinamide, also known as vitamin B3. It has weak hygroscopicity, can keep skin moisture and promote dermal microcirculation. Nicotinamide is mainly used as whitening ingredient in cosmetics. It can act on the produced melanin, reduce its transfer to surface cells, accelerate skin metabolism, promote the shedding of melanocytes and improve skin quality. Reduce or eliminate skin aging, such as wrinkles, peeling, large pores, etc. Reduce the damage of free radicals to the skin, prevent aging, repair the skin and reduce facial dullness. Add safely? Nicotinamide, as a whitening component, has proved to be effective in treating chloasma and hyperpigmentation caused by ultraviolet rays when its concentration is 2%~5%. Topical nicotinamide (2%) can reduce the production of fatty acids and triglycerides in sebum, and has the effect of controlling oil secretion. It is reported that the gel containing 4% nicotinamide has the same curative effect on acne vulgaris as the gel containing 1% clindamycin (the main external prescription for acne treatment). Is it safe? Nicotinamide is a water-soluble substance with solution stability and light stability. In the solution with PH value of 6, the stability is the best. In the solution with PH higher or lower than 6, nicotinic acid will be hydrolyzed to cause skin allergy. Therefore, the formula containing nicotinamide generally controls the pH value between 5 and 7 to reduce the formation of nicotinic acid. Girls with red and bloodshot skin should stay away from nicotinamide. What common skin care products contain this ingredient? 6、SymWhite？ Why did you add this ingredient? This is a great whitening ingredient, and its Chinese name is phenylethyl resorcinol, which is also known as SymWhite? 377 (New Compound White developed by German raw material supplier Dezhixin, patented product, approved for global use). Why is it awesome? This ingredient is one of the few new raw materials that China SFDA (China Food and Drug Administration) applied for and passed. SymWhite？ 377 is one of the reported tyrosinase inhibitors with the highest activity, which is 22 times that of kojic acid. SymWhite？ 377 effectively inhibited the melanin synthesis activity of B 16V cells, which was 2 10 times that of kojic acid. SymWhite？ The whitening effect of 377 is 7000 times that of arbutin! It can improve uneven skin color and reduce skin color caused by ultraviolet radiation. Meanwhile, SymWhite? 377 is an excellent antioxidant with anti-wrinkle ability, which is superior to VE, VC and BHT. Add safely? 0. 1- 1.0% Is it safe? Good safety and stability. What common skin care products contain this ingredient?