Alpecin tuning shampoo enhances the natural hair colour and tints covering grey hairs as we grow older our hair loses the ability to form colouring melanin pigments so that the hair shaft becomes whiter and as a result as the hair grows it becomes whiter alpecin tuning shampoo also contains caffeine which prevents hereditary hair loss and can be used daily as part of your hair cleansing programme overall your hair will look darker and fuller again