Designed with four active ingredients which work together to combat and prevent dandruff the alpecin dandruff killer shampoo promises to leave the scalp soft soothed and flake free containing zinc pyrithione and piroctone olamine to fight against fungi bacteria and yeast whilst salicylic acid and fumaric acid remove existing dandruff this unique anti dandruff shampoo reduces irritation to leave you feeling refreshed suitable for daily use kd directions for use apply a walnut sized