Alpecin Grey Attack Caffeine & Colour Shampoo 200mlAlpecin Grey Attack Caffeine & Colour Shampoo gradually darkens and strengthens hair with a natural looking color effect. The caffeine complex energizes hair roots, promoting growth. Suitable for men with initial grey hair, it is best used daily for the first few weeks to achieve the desired color. Key Features Gradually darkens grey hair Caffeine activates hair roots Contains zinc and niacinamide Enhances color and thickness Suitable for light brown