Reduce & prevent dandruff with the Alpecin Double Effect shampoo, made with a unique & effective caffeine-rich formula which provides instant, noticeable results. It works to loosen & remove dandruff whilst enriching the hair from the roots, leaving your scalp feeling soothed & refreshed. Containing salicylic acid & piroctone olamine, two highly effective anti-dandruff ingredients, this shampoo is a must have. K.D.