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8 Vitamin D Benefits—and How to Get More D in Your Diet
Vitamin D Deficiency: MedlinePlus
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Vitamin D is Essential to All Systems of the Body - GrassrootsHealth
The effect of monthly vitamin D supplementation on fractures: a tertiary outcome from the population-based, double-blind, randomised, placebo-controlled D-Health trial - The Lancet Diabetes & Endocrinology
Nutrients | Free Full-Text | Immunologic Effects of Vitamin D on Human Health and Disease
The Body Needs All Forms of Vitamin D - GrassrootsHealth