Our retinol face serum contains vitamin E (tocopherol), glycerin. It traps moisture deep into the skin, providing lasting moisture and leaving the skin looking fuller and healthier. It locks moisture deep into the skin, providing lasting moisture and leaving the skin looking fuller and healthier. Its application method is very simple: clean the facial skin to keep the skin dry, apply appropriate amount of this product evenly on the facial skin, gently massage until completely absorbed. And the packaging design is simple, easy to use, suitable for travel.