No matter what the cause having thin hair can be frustrating loreal professionnel have come to the rescue with serioxyl using innovative ingredient stemoxydine the serioxyl densifying haircare programme can give you visibly thicker and fuller looking hair in an instant set contains step 1 clarifying shampoo 250ml a cleansing product leaving hair looking fuller and thicker whilst protecting your colour to use apply evenly to wet hair and rinse thoroughly repeat if desired step 2