Our retinol face serum contains glycerin, vitamin E (tocopherol). It can improve skin texture, restore skin shine and healthy elasticity. The way to use it is simple: clean the face and keep the skin dry. Apply appropriate amount of this product evenly on the face. Gently massage until absorbed. It can also enhance the skin's barrier function, help repair damaged skin cells, reduce fine lines caused by dryness, and improve skin elasticity and firmness.