Calcium dietary supplement fact sheet. National Institutes of Health Office of Dietary Supplements. http://ods.od.nih.gov/factsheets/Calcium-HealthProfessional/. 11/21/2013. Accessed 3/10/2015.
Reid I, Bolland M. Does Widespread Calcium Supplementation Pose Cardiovascular Risk? Yes: The Potential Risk Is a Concern. Am Fam Physician. 2013 Feb 1;87(3):online. http://www.aafp.org/afp/2013/0201/od1.pdf. Accessed January 2015.
USDA National Agricultural Library. Dietary Reference Intakes: Recommended Intakes for Individuals. http://fnic.nal.usda.gov/dietary-guidance/dietary-reference-intakes/dri-tables 2011. Accessed April 2013.
Institute of Medicine National Academies. Dietary Reference Intakes (DRIs): Estimated Average Requirements. Food and Nutrition Board. http://www.iom.edu/Activities/Nutrition/SummaryDRIs/~/media/Files/Activity%20Files/Nutrition/DRIs/5_Summary%20Table%20Tables%201-4.pdf. Accessed April 2013.
US Preventive Services Task Force. Vitamin D and Calcium to Prevent Fractures: Preventive Medication. http://www.uspreventiveservicestaskforce.org/uspstf12/vitamind/vitdfact.pdf. July 2015.
USDA. Dietary Guidelines for Americans, 2010. 7th Ed. Washington, DC: U.S. Government Printing Office, December 2010.