ABSTRACT
I. INTRODUCTION The primary function of shampoos is to clean the hair, thereby improving its appearance through the removal of dulling deposits that can weigh the hair down and even cause it to stick together. The main function of conditioners is to reduce the magnitude of the forces associated with combing or brushing hair. This latter benefit is also provided, to differing extents, by conditioning shampoos, while both products can provide important secondary benefits such as dandruff control, hair moisturization, flyaway reduction, and improvement of shine.
