With age, hair increasingly loses its ability to form the colouring melanin pigments, causing the shafts of your hair to become white. As more hair becomes white, your hair will increasingly appear grey in colour. Alpecin Tuning Shampoo fortifies your natural hair colour and tints early grey hairs. The intensive pigments in the shampoo make your hair look darker and fuller again. At the same time, the Caffeine Complex introduces an activating ingredient to the hair. Alpecin Caffeine is detectable in the hair after just 120 seconds. Alpecin Tuning Shampoo is suitable for daily use. Leave the shampoo on the scalp for about 2–5 minutes, and then rinse out. Only apply to dark to black hair.