ChooseMyPlate.gov: “Tips to Help You Make Wise Choices from the Protein Foods Group.”
U.S. Department of Agriculture: “National Nutrient Database for Standard Reference, Release 18,” January 2005.
Donald Layman, PhD, nutrition professor, University of Illinois, Urbana-Champaign.
Rebecca Reeves, DrPH, RD, assistant professor and managing director, Behavioral Medicine Research Center, Baylor College of Medicine, Houston.
Katherine Tallmadge, MA, RD, author, Diet Simple.