Rye and sourdough multigrain breads are additional varieties. Carrot bread can be prepared as a sourdough and multigrain bread. Multigrain breads also provide complex carbohydrates. Multigrain bread is a type of bread prepared with two or more types of grain. Whole-wheat and multigrain spaghetti are also available. Multigrain bread is commercially mass-produced and marketed to consumers. Multigrain congee mixes are sold in the health food sections of Chinese supermarkets. They are known for their multigrain crust and their pizza by the slice. In Canada and certain regions of the United States, there is also Multigrain Life.