How long do I have to use the Tuning Shampoo to obtain a visible result?
That depends on the condition of your hair and its share of grey hairs. Every time men use the Tuning Shampoo, dark pigment attaches to the surface of the hair. It covers up lighter patches and counteracts the greying process. The effect gradually intensifies with each wash. Leave the shampoo on for about 2–5 minutes, and then rinse out. The Colour Effect and caffeine penetration improve with longer residence time.