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What's the story on Vitamin D - Food Politics by Marion Nestle
Vitamin D - Wikipedia
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Vitamins, Hormones, and Bones: Have You Had Your Vitamins Today? - Warde Medical Laboratory
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Vitamin D and your health: Breaking old rules, raising new hopes - Harvard Health
How is vitamin D made by the sun different from vitamin D in supplements? - GrassrootsHealth
Vitamin D and Fatigue | Infographics
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Vitamin D | Linus Pauling Institute | Oregon State University
Vitamin D3 Production - McIsaac Health Systems Inc.
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Vitamin D3 (cholecalciferol) – HOPES Huntington's Disease
Vitamin D Supplements | How It's Made
