Special K is a brand of breakfast cereal produced by Kellogg's. It was first introduced in 1955 and is primarily made from rice and wheat. The cereal is marketed as a low-calorie option, often appealing to those looking to manage their weight. In addition to the original cereal, Special K has expanded its product line to include various flavors, protein bars, and snack items. The brand promotes a balanced lifestyle and often features campaigns encouraging healthy eating and exercise.