It should be used at least 3 times a week and even every day to control dandruff for a minimum of 6 weeks to have a healthy scalp again. Once dandruff is controlled, you can gradually reuse a line of products for regular use such as our MEN VITANE DAILY USE SHAMPOO that will help restore the vitality and natural shine of the hair. In case dandruff does not improve or its symptoms worsen (red, inflamed and itchy scalp) after using Vitane anti-dandruff shampoo, it is recommended to see a specialist doctor, since medical treatment may be needed.