Product Name: Kojic acid
CAS: 501-30-4
MF: C6H6O4
MW: 142.11
EINECS: 207-922-4
Appearance: White powder
Kojic Acid is a natural compound that certain fungi and bacteria produce during fermentation. People commonly derive it from processes like making Japanese rice wine, sake.

In the world of cosmetics and skincare, this ingredient plays a starring role. Its primary function is to effectively inhibit the enzyme tyrosinase. This enzyme is crucial for the production of melanin, the pigment that gives our skin its color. By interrupting this process, Kojic Acid helps prevent the formation of dark spots and uneven tone.
Therefore, Kojic Acid serves as a highly popular skin-brightening and lightening agent. Formulations frequently include it to address issues like hyperpigmentation, age spots, sun spots, and melasma. Many users see a visible reduction in the appearance of these dark patches over consistent use.
Furthermore, Kojic Acid offers additional skincare benefits. It acts as a gentle antioxidant, helping to neutralize free radicals that contribute to skin aging. Some studies also suggest it possesses mild antibacterial properties, which can be beneficial in formulations for acne-prone skin.
However, product developers must formulate with care. Kojic Acid can sometimes cause skin sensitivity or irritation in certain individuals, especially at higher concentrations or with prolonged use. Consequently, reputable cosmetic products typically combine it with stabilizing and soothing ingredients like vitamin C, vitamin E, or licorice root extract. This enhances both its efficacy and skin tolerance.
In summary, Kojic Acid is a potent and naturally-derived active ingredient in cosmetic science. It directly targets melanin production to promote a more even, radiant complexion, making it a cornerstone in many brightening serums, creams, and treatments worldwide.
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