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YouTube·Website publication: Jan 5, 2026

What You Don't Know About Vitamin D3 Deficiency

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By Andrew Behrman1 min read

Dr. Purser explains how this deficiency may contribute to new onset of Type 1 diabetes, and how it relates to insulin receptors. Explore other symptoms of this deficiency such as osteoporosis, fatigue, and pallor. Discover how serum and intracellular laboratory testing reveals Vitamin D3 deficiency. Learn how Vitamin D2 is converted to Vitamin D3 in sunlight.

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Original sourceDan Purser MD
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