In which patients with chronic kidney disease and low 25-OH vitamin D levels do you prefer weekly ergocalciferol to daily cholecalciferol supplementation?  

Ergocalciferol (D2), the plant-based form of Vitamin D, and cholecalciferol (D3), the animal-based form, are essentially equivalent in potency with perhaps a small, clinically insignificant edge favoring D3. They both can be given at long interdose intervals; monthly doses provide the same impact on...