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.