What Do Different Face Acids Do?
What You Need to Know About the 6 Main Skincare Acids
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“Kojic acid is found in many species of fungi — particularly the Japanese Aspergillus oryzae (Koji),” said Dr. Zelickson. “It is also created as the by-product of fermenting rice to make sake.”
Kojic acid is a mighty antioxidant that works by inhibiting pigment formation in plant and animal tissue. For example, it’s used to prevent brown spots on fruit and seafood, and has a similar effect in skincare.
“Similar to vitamin C, it decreases an enzyme called tyrosinase, which is important in melanin formation. For these reasons, it is abundant in skin products and peelings agents designed to brighten irregular or uneven pigment,” explained Dr. Zelickson. “This is a great ingredient choice for women who are concerned about pigment, but are pregnant or breast-feeding.”
As with many active products, it can cause skin irritation and potential allergic reactions in sensitive individuals. We recommend doing a test strip behind your ear or back of the neck and waiting a few days before moving forward with a product.