Vitamin C is an effective antioxidant that brightens the skin tone and reduces the appearance of signs of aging. The Ordinary Ethylated Ascorbic Acid 15% Solution offers a direct-acting form of Vitamin C, an effective antioxidant that has been shown to reverse multiple signs of skin aging while brightening the skin when applied topically. In its pure form, Vitamin C is unstable in water. This formula offers a highly-stable, water-free, 15% Ethylated L-Ascorbic Acid solution. Unlike Vitamin C derivatives, ELAA does not require conversion to LAA (pure Vitamin C) and is directly usable by the skin. Using propanediol as the carrier for ELAA also ensures that it can efficiently penetrate into the skin and offer the best possible results. Water-free, Alcohol-free, Oil-free, Nut-free, Vegan, Gluten-free. Brighten your visage ASAP with The Ordinary's Ethylated Ascorbic Acid 15% Solution (30ml). This oil-like vitamin C serum has gone through a process called ethylation which makes this solution more stable and reduces the vitamin's molecular size, allowing for faster results. The appearance of pigmentation and dark spots are reduced while skin tone will look more even and radiant. This advanced water-free formula has antioxidant properties, meaning your skin is more protected from environmental stressors (AKA wind, UV and pollution).