Alpecin Active Shampoo A3 is effective in treating both the hair and scalp against dandruff. Used regularly, it even works to prevent the development of new dandruff. It's anti-dandruff ingredients work continuously against even the most persistent dandruff condition. As with other Alpecin shampoos, a special skin activator helps keep the scalp healthy, protects the hair roots and strengthens the hair. Leaves hair with silky shine!