(3) treatment of dandruff: This is one of the main and most important function of each product shampoo, should the investment to improve this functionality to satisfy customers is a core issue for the success of the product. Other features of the product can suffer from a number of defects, the customer can bypass if products that treat dandruff as well. For example, a customer purchases product shampoo silky soft but treat dandruff is not good, you are not satisfied for a hair silky iridescent but many dandruff will reduce the aesthetic to the person's hair.
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