Professional formula for hair care with thin ends that do not grow longer. Enriched with patented FILLER-A100 and Amino Acid technology, Serie Expert Pro Longer Concentrate provides immediate strengthening, durability and filling of the ends. BENEFITS Fills in the tips from the first application Long-lasting results Reduces split ends by up to 20% Active Ingredients An exclusive combination of FILLER-A100 and Amino Acids that repairs lengths and fills in ends.FILLER-A100 , a patented technology exclusive to LOréal Professionnel, penetrates the core of the hair, increasing density at the tips and providing reconstruction.Amino acids strengthen hair. For longer, fuller and more beautiful hair.