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DHHS. NIH. Office of Dietary Supplements.
Mayo Foundation for Medical Education and Research.
Oregon State University. Linus Pauling Institute. Micronutrient Information Center.
DHHS. NIH. National Library of Medicine.
Review MedlinePlus resources, including current research related to Vitamin D.
American Heart Association.
Harvard School of Public Health.
DHHS. NIH. National Library of Medicine.
Read about the function, sources, and intake recommendations for Vitamin D.