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CDC: "Plan Ahead: Folic Acid Can Help Prevent Certain Birth Defects."
Cleveland Clinic: "Anemia and Iron-Rich Foods."
Council for Responsible Nutrition: "Vitamin and Mineral Recommendations."
Harvard Health Publications: "Listing of Vitamins."
LiveScience.com: "Facts About Calcium."
Mayo Clinic: "Goiter."
NIH Office of Dietary Supplements: "Dietary Supplement Fact Sheets."
USDA National Agricultural Library: "Vitamins and Minerals."
"Vitamins and Minerals: What You Should Know About Essential Nutrients," Mayo Clinic Women's HealthSource Special Report, July 2009.
World Health Organization and Food and Agriculture Organization of the United Nations: "Vitamin and Mineral Requirements in Human Nutrition, Second Edition"
World's Healthiest Foods.
Yale Scientific: "Myth Busters: Does Vitamin C Really Help?"
Reviewed by Carol DerSarkissian on May 28, 2018
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