eCosmetics is an authorized retailer of ROSEGOLD Paris.What is it? A serum composed of natural ingredients and powerful active agents.WHAT MAKES IT SPECIAL?Highly concentrated vitamins and active ingredients such as Biotinyl GHK and Biotin A level of naturalness superior to 98% without compromising the effectiveness of the product Can be used as a 3 to 6 month cure (1 flask = 1 month) Usually applied in the evening just before bedtime to allow the product to work through the night