This COSRX The Vitamin C 13 Serum is a gentle vitamin c serum formulated with 13% pure vitamin c to improve uneven skin tone, fade acne scars, hyperpigmentation and dark spots. To enhance the effects of Vitamin C, this formula is infused with a Vitamin E derivative that acts as a powerful antioxidant. Combined, these ingredients work in synergy to provide maximum protection against environmental damage, helping to prevent premature ageing - fine lines and wrinkles and maintain a youthful appearance. With the addition of sodium hyaluronate to make sure skin stays hydrated and moisturised. Enriched with allantoin, a soothing ingredient that helps to alleviate skin irritation this serum provides a calming effect, making it suitable for sensitive skin types.