Brand new, factory sealed Kerastase Specifique Intervention Antichute A L'Aminexil Hair Loss Treatment 4 week supply / 42 x 6ml - Prolongs the life of the hair - Adds 5% density within 6 weeks Aminexil is a patented anti-hairloss molecule which prevents hardening of collagen; phenomenon leading to the "strangulation" of the hair and premature aging of the hair follicle. Please take time to browse around in our store as we have a huge selection of fragrances, skincare, makeup and other beauty products. Thanks for stopping by!