The COSRX Oil-Free Ultra Moisturising Lotion With Birch Sap is a scientifically formulated skincare product designed to provide deep hydration without clogging pores. The key active ingredient in this lotion is birch sap, which is rich in vitamins, minerals, and antioxidants that are beneficial for the skin. Birch sap contains natural sugars such as xylitol, which help to hydrate and nourish the skin by attracting and retaining moisture. Furthermore, the lotion contains hyaluronic acid, a potent humectant that is known for its ability to hold up to 1000 times its weight in water. This ingredient helps to plump up the skin and improve its elasticity, resulting in a more youthful appearance. Additionally, hyaluronic acid is also involved in wound healing and tissue repair processes in the skin. Glycerin is another key ingredient in the COSRX lotion, serving as a moisturizer and emollient that helps to soften and smooth the skin. It works by attracting water from the environment and the lower layers of the skin to improve hydration levels on the surface. The oil-free formula of this lotion is suitable for all skin types, including oily and acne-prone skin, as it provides hydration without adding excess oil. Its lightweight texture ensures quick absorption into the skin without leaving a greasy residue. The pH of the lotion is optimized to maintain the skin's natural acid mantle, which is critical for skin health and protection against pathogens.