Serioxyl range from L’Oréal Professionnel. Your thinned hair will say thank you. Why does it work well? These products have been developed with advanced technology and a specific, patented molecule that awakens the dormant follicle to create new hair. Thanks to the unique Serioxyl care properties, it is now possible to regain more hair density. Serioxyl serums are applied directly to the scalp using a pipette. There is also a powerful antioxidant (resveratrol), which potentiates the effect of stemoxydine on the scalp for rapid performance.