L’Oréal Professionnel Serioxyl Natural Thinning Hair, 250 ml, Shampoos for Women, The L’Oréal Professionnel Serioxyl Natural Thinning Hair shampoo cleans the scalp effectively, washes hair thoroughly, and restores its natural beauty. Characteristics: strengthens the hair fibre regenerates and nourishes hair washes hair and cleans the scalp stimulates hair growth How to use: Apply an appropriate amount of shampoo to wet hair. Work up a lather and rinse thoroughly. Repeat if necessary.