Vit D required: For the most part, supplemental Calcium is not necessary. In fact too much Calcium intake is associated with hardening of the arteries. Yes vitamin D3 is necessary for your body to be able to use Calcium. So the best practice for good health is to get enough sun exposure (that's how your supposed to make your own vit D), eat a lot of green vegetables (Ca), and take a vit D3 supplement if needed.
Answered 2/21/2017
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