Alpecin Double Effect Shampoo fights against dandruff & hair losshereditary with caffeine complex. In the first step, this Double Effect Shampoo loosens scaly, keratinous cells & thoroughly removesdandruff from the scalp. This clears the way for the caffeine complex. In the second step, the active ingredients penetrate into the hair rootand strengthen it against hereditary hair loss. Leave the product on the scalp for two minutes- from application torinse.