A lightly toasted breakfast cereal manufactured by the Kellogg Company. The cereal was introduced to the United States in 1956. It is made primarily from rice and wheat. It is marketed primarily as a low-fat cereal that can be eaten to help one lose weight. It frequently has give-away offers for various health and fitness products or contains dieting information on the back of the box. The diet that Special K advocates is called "The Special K Challenge. " The goal of "The Special K Challenge" is to lose 6 pounds in 2 weeks.