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Vitamin D: Is It SAFE to Take 10,000 IUs a Day? | Dr. Steven Gundry
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Rich Vitamin D Foods | Get Strong Bones | Reduces Vitamin D Deficiency | Dr. Manthena's Health Tips
The Best and Worst Times to Take Your Vitamin D! Dr. Mandell
How Much Vitamin D Per Day? [Vitamin D Deficiency Symptoms]
The Worst Way to Take Vitamin D! Dr. Mandell
Vitamin D Dosage and Levels Advised