Selecting the right whey product can ultimately be key to achieving the desired end-product result, both economically and in terms of functionality. Manufacturers therefore offer a whole range of whey products with a variety of properties. Each product is especially developed for specific applications, and manufacturers also extend their offers to expert advisory services on such applications. Whey products need to take into account the properties required for the respective foods in which they will be used. The functionality of whey products can be employed to enhance foods. These merits, however, go far beyond the economic advantage of reducing solid masses or substituting other milk-based substances with lactose or whey powder.