Timeless Vitamin C Serum is formulated with 20% vitamin C in the form of L-ascorbic acid, which is a highly stable and effective form of vitamin C. It also contains ferulic acid, which is a plant-based antioxidant that can help to boost the effectiveness of vitamin C. The serum is designed to be used as a daily treatment to help brighten and tighten the skin, improve skin texture, and reduce the appearance of fine lines and wrinkles.