The Ordinary Ethylated Ascorbic Acid 15% Solution is a stable, direct-acting form of Vitamin C designed to brighten skin tone and reduce signs of aging. This water-based serum features a 15% concentration of ethylated ascorbic acid for enhanced stability and efficacy. Key features: • 15% ethylated ascorbic acid concentration • Stable form of Vitamin C • Water-based formula • Direct-acting brightening effects • Dropper bottle packaging for precise application This solution provides the benefits of Vitamin C in a highly stable form that resists oxidation better than traditional ascorbic acid. The ethylated version allows for better penetration into the skin while maintaining efficacy. The product comes in an amber glass bottle with dropper applicator to protect the formula from light degradation. For best results, apply a few drops to clean skin in the morning or evening before heavier creams. Can be used daily as part of a skincare routine.