The serum with light texture, hypo-allergenic and a high-quality finish. Regarding concentrations, it is a High concentration 15% Vitamin C where you can start with more choices for people who can tolerate higher concentrations. The container is ideal for vitamin C stability (dark-non transparent bottle, white to reflect light. The bottle’s material is non interactive with the vitamin C. MEDEE SERUM bottle’s airless pump prevents oxygen oxidation of vitamin C). MEDEE SERUM contains most essential antioxidant agents: Vitamin C has an anti-aging, whitening effect and provides skin shine; Vitamins E maintains skin young, while Vitamin A is a clarifying agent.