Kojisäure-Weißmacher-Ass
Kojisäure, also known as “kojic acid” or “Ju acid”, is a microbial fermentation product, which exists in the brewing of soy sauce, bean paste and wine, and the presence of kojic acid can be detected in many fermented products fermented by Aspergillus.
The first scientists found that the hands of the brewers were particularly white, after the study of the fermentation, it was later found that kojic acid not only has a good fresh-keeping effect, it also has a good whitening effect, brightening, even skin color are not a word. Many European and American dermatologists use 2-4% kojic acid to treat patients with melasma, and have achieved good results.
Functional effects of Kojisäure
Skin whitening
Kojisäure can inhibit the activity of tyrosinase, prevent the production of melanin, the concentration of 20μg/ml Kojic acid can inhibit the activity of a variety of tyrosinase 70%-80%, the recommended addition amount of 0.5%-2% in cosmetics, inhibit the production of melanin, to achieve the effect of whitening spots.
Antioxidationsmittel
Kojic acid in addition to whitening, but also to remove free radicals, antioxidant effects. Can help astringent skin, promote protein aggregation, firm skin. It not only has certain antibacterial properties, but also has certain moisturizing ability, and can even be used as a preservative for food and cosmetics. Because kojic acid can inhibit the activity of hyaluronidase, it can also inhibit allergies.
The whitening principle of kojic acid
Inhibits tyrosinase
Kojisäure, like VC, binds to copper ions and inactivates tyrosinase.
Inhibit the production of melanin oxidation intermediates
Kojic acid can be oxidized by the intermediate dopa quinone, thereby reducing the substrate of the chain reaction and inhibiting the conversion of the melanin intermediate from the dopa quinone form to the final melanin. Because the effect is more violent, the lower concentration can achieve a good effect, because the effect is too strong, it may lead to skin redness and contact dermatitis, so most of the whitening products are added relatively low.
Advantages of kojic acid
High transdermal absorption rate, good tyrosinase inhibition effect, no cell toxicity;
It can be used to whiten, remove freckles, improve skin color, etc.
Can play an additional role in water retention and increase skin elasticity;
Kojic acid application precautions
Kojic acid in strong light or strong acid environment will fail, but increase melanin, so it is best to use kojic acid products at night alone;
Avoid the use of salicylic acid, fruit acid, high concentration of VC and other ingredients, and the combination of highly irritating effective ingredients can easily lead to excessive skin irritation, rolover and destruction of the barrier;
Strong hydration, pay attention to sun protection to prevent anti-dark.
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