5:47 - Vitamin D2 vs D3 6:33 - Vitamin D from Supplements 8:38 - Who Might Need a Vitamin D Supplement? 9:38 - Which is the Best Way to Get ... ... <看更多>
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5:47 - Vitamin D2 vs D3 6:33 - Vitamin D from Supplements 8:38 - Who Might Need a Vitamin D Supplement? 9:38 - Which is the Best Way to Get ... ... <看更多>