price performer with quality packaging [SEP] this serum keeps my facial skin moist i have been using it daily for a month applying it before my moisturizer and have not noticed any difference in my skins appearance but i also know that facial products need to be consistently used for a dedicated period of time in order to see change with vitamin c in its composition it has one of the highest vitamin c levels in serums on the market the price is excellent as well i can buy four bottles of this serum for what i was paying for a product with a lesser vitamin c concentrate the dark brown glass packaging keeps the product from rapidly deteriorating just ordered my second bottle