COSRX – The Vitamin C 23 Serum, This potent serum features a high concentration of 23% L-ascorbic acid (pure vitamin C), formulated to target visible signs of aging and pigmentation. It’s stabilized with vitamin E (tocopherol) to enhance antioxidant efficacy and hyaluronic acid for hydration, creating a balanced blend that mitigates irritation. The lightweight, fast-absorbing serum is housed in an opaque or amber bottle to protect against light degradation. COSRX’s fragrance-free, minimalist formula is ideal for those seeking clinical-strength brightening without unnecessary additives.









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