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What is Vitamin D? (Linus Pauling Institute)
Vitamin D Myths, Facts, and Stats (Natural News)
Low Vitamin D Levels Pose Large Threat to Health (Science Daily)
Vitamin D Vital For Heart (US Dept of Health & Human Services)
Vitamin D: Good for More than Bones (Drs. Judge & Barish-Wreden)
Juvenile Diabetes and Vitamin D (Nutri.com)