O HUI Prime Advancer De-Aging Ampoule Serum 20ml Special SetSerum 20ml + Serum 10ml + Cream 7ml + Gel Cleanser 40ml This ampoule serum helps promote elasticity of the skin for a firmer skin texture with Green PDRN. Formulated with Phloretin and Caffeine, which are rich in antioxidant, to help maintain a healthy, youthful skin complexion. Calms skin irritated by the external environment. Provides delicate care to the core of the skin, strengthening the skin barrier.