Remove processed ingredients and also brew, and be careful and vitamins and supplements that may contain protein too.
http://tutul1.edublogs.org/2013/09/11/huntsman-gatherer-gourmet-certain-dieters-have-chosen-paleolithic-fare-and-the-rest-is-prehistory/
http://tutul1.edublogs.org/2013/09/11/huntsman-gatherer-gourmet-certain-dieters-have-chosen-paleolithic-fare-and-the-rest-is-prehistory/