Vitamin C comes in many forms and has multiple skin benefits. TetraHexyldecyl Ascorbate, a lab-created form of the vitamin, is oil-soluble, meaning it can penetrate the skin more effectively than water soluble versions. When formulated at the correct pH, as in our products, it is also highly stable. This form of vitamin C also acts as an antioxidant, essential cofactor in collagen synthesis, and exfoliator, promoting cell turnover. Plus, it can brighten skin tone by decreasing the activity of tyrosinase (a naturally occurring enzyme that regulates melanin production in the skin), which helps to inhibit irregular production of melanin.