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