Stop hair loss and improve the overall vitality of thinning hair. The L'Oréal Professionnel Serie Expert Aminexil Advanced concentrated treatment will help stimulate hair growth and at the same time slow down hair loss and thinning. One of the most effective ingredients in Aminexil, it was developed by L'Oréal Professionnel and is one of the best in the fight against hair loss and thinning. Aminexil penetrates deep into the hair follicle, prevents the hardening of collagen and keeps the hair roots flexible and strong. It helps to strengthen the hair and prolong its growth phase. After just 6 weeks of daily application, 130 testers noted a reduction in hair loss symptoms.