Formulated with Centella water that soothes and calms skin, making this formula non-irritating and suitable for all skin types. Formulated at pH 3.9 - 4.9 formulated with high-grade COS-VCE (Ethyl Ascorbic Acid) by CosMol Korea, a leading global supplier. Reduces signs of ageing and neutralizes skin damage to make skin more elastic and full of life. Gans Vitamin C serum is free from Sulfates, Paraben, SLS, Petroleum, Artificial Preservatives, & Colors.