What It Is: Pura d'or 20% Vitamin C Serum with Hyaluronic Acid is an effective anti-aging serum infused with all plant base ingredients including Vitamin E, Argan Oil, Aloe Vera, Ferulic Acid and Super Anti-Oxidants What It Does: Pura d'or 20% Vitamin C Serum's Super Concentrated formula is designed to target skin imperfections. Our special ingredient blend aids skin to appear firmer, with increased elasticity.All Vitamin has a natural sour smell to it. It is the smell of ascorbic acid combined with our active ingredients. We do not add in any artificial fragrance to try to cover this up. So a normal user is not aware of this and think it has gone bad. Boosted with Hyaluronic acid, this serum leaves skin balanced in a delicate vibrant shine. Lasting softness is acheived, all while neutralizing harmful free radicals.