This system is supported with the addition of Vitamin B5 which also enhances surface hydration. Helps skin look and feel hydrated. The molecular size of HA determines its depth of delivery in the skin. This formulation combines low-, medium- and high-molecular weight HA, as well as a next-generation HA crosspolymer at a combined concentration of 2% for multi-depth hydration. Directions Apply a few drops to face AM and PM before creams.