Most muesli mixes contain pellets. These are composed of ingredients that have been ground down and compressed. Like extrusions, the exact composition of the pellets in muesli mixes is not given although the ingredients and analysis of the whole muesli mix is stated. The pellets are often a variety of sizes and colours. Pellets are cheaper to produce than extrusions. A vitamin and mineral supplement is necessary for muesli mixes in order to balance out the deficiencies in the ingredients. As the supplement is a powder, it may be incorporated into the pellets because vitamins in extrusions can be denatured by the cooking process. The pellets are the least palatable part of the mixture and are often left with whole grains in the bottom of the bowl, complete with the vitamin and mineral supplement that the pellets contain.