A method for forming a modified micellar casein concentrate includes providing a volume of skim milk. The method further includes performing a first filtration process on the volume of skim milk to form a micellar casein concentrate. The method includes mixing carbon dioxide with at least a portion of the micellar casein concentrate to solubilize one or more components of the micellar casein concentrate. The method includes performing an additional filtration process on the mixture of carbon dioxide and micellar casein concentrate to remove at least a portion of the one or more solubilized components of the micellar casein concentrate to form a modified micellar casein concentrate.
