The Claire-ity 25% Vitamin C Serum is a highly concentrated facial serum that is loved by many Amazon customers. It contains a high percentage of Vitamin C, along with other beneficial ingredients like hyaluronic acid and Vitamin E, to brighten and rejuvenate the skin. This serum helps to reduce the appearance of fine lines, wrinkles, and dark spots, while improving overall skin tone and texture. Users rave about the lightweight and non-greasy formula, as well as the noticeable improvement in their skin's radiance and clarity.