Ordinary Multi-Functional Serum (Essence). I received this as a gift, and about half of it remains. N10+Z1 Face Serum is a water-based serum that effectively combines Vitamin B3, known as Niacinamide, and Zinc PCA. It smooths the skin's surface, gives it a glow, and helps to minimize the appearance of pores. It provides moisture to support the skin's moisture barrier, leading to a brighter and more even skin tone. Contains Zinc PCA, which is also suitable for skin concerned about excess sebum. I am unable to offer a discount, but thank you for your understanding. Please refrain from purchasing if you are overly concerned about details.