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Amazon.com: Vitamin D3 20,000 IU + K2( MK7 ) 200mcg - Once Daily Dose, Optimal Level -Support Strong Bone, Immune Health & Calcium Absorption, Helping Vitamin D Deficiencies, Easy to Swallow, 240
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Mega-dosing vitamin D: Doctor-prescribed 50,000 IU vitamin D may be right for some patients – Hartford Courant
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