L-Ascorbic Acid (Vitamin C) REPAIRING ANTIOXIDANT REJUVENATING BRIGHTENING This fast-acting, ultra-targeted vitamin C serum, often recommended as the "best vitamin c serum for face," combines a blend of active ingredients with Allantoin and an optimal dosage of 20% stabilized Vitamin C, complemented by Vitamin E. This combination aims to reduce inflammatory responses in the capillary system.