L'Oréal Professionnel Density Advanced shampoo is one of the best shampoos for thickening hair and improving hair density. Enriched with omega 6 and other caring ingredients, the L'Oréal Professionnel Density Advanced shampoo nourishes roots, restores vitality, and adds density to your hair. For best results, apply Aminexil anti-hair loss activator serum at night after washing your hair with L'Oréal Professionnel Density Advanced shampoo.