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IMAGES PROVIDED BY:
Harvard School of Public Health: "Vitamin D."
National Cancer Institute: "Vitamin D and Cancer Prevention."
National Institutes of Health Office of Dietary Supplements: "Vitamin D."
New England Journal of Medicine: "How Much Sunlight Is Equivalent to Vitamin D Supplementation?"
UpToDate: "Patient education: Vitamin D deficiency (Beyond the Basics)."
U.S. Department of Agriculture: "Vitamin D in Mushrooms."
U.S. Department of Health and Human Services Office of Disease Prevention and Health Promotion: "Dietary Guidelines: 2015-2020."
Reviewed by Hansa D. Bhargava, MD on June 16, 2020
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