VITAMIN D3
What it isVitamin D3 precursor converted to calcitriol; deficiency treatment and osteoporosis support.
Why this oneIt raises and sustains vitamin D better than ergocalciferol and is inexpensive over the counter.
What limits itAdvanced kidney failure impairs activation; excess causes hypercalcemia. Use an active vitamin D analog when activation is the problem.
NO BOXED WARNINGS
Principal riskIt cannot be activated in advanced CKD

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