Rinses are intended to help condition the hair after shampooing. Some formulations are Shampoos and Rinses in the same product. The safety of these products is ensured through the careful selection of ingredients that are safe for these products. Manufacturers conduct extensive safety tests to ensure that these products are safe. Among the tests conducted are those to ensure that the products are not irritating or that they cause allergic reactions. As with all products, it is very important to read and follow the directions for use that are on the product. The FDA recommends that Hair Shampoos and Rinses be assessed to determine the type and degree of eye irritation that may occur, and to assure that products are not contaminated and will not become contaminated during normal use.