Vitamin D Recommendations for Patients with Kidney Stones

Assessment and Monitoring Approach

The American Journal of Kidney Diseases recommends assessing 25-hydroxyvitamin D [25(OH)D] levels in patients with kidney stones, as vitamin D insufficiency is common in this population, affecting approximately 80-90% of patients with CKD 3, 4

For vitamin D deficiency/insufficiency in patients with kidney stones, the American Journal of Kidney Diseases suggests using cholecalciferol (vitamin D3) or ergocalciferol (vitamin D2) to correct deficiency, with cholecalciferol potentially having higher bioefficacy 3
The American Journal of Kidney Diseases recommends targeting 25(OH)D levels of at least 30 ng/mL (75 nmol/L) to prevent secondary hyperparathyroidism 3, 4
For maintenance after repletion, the American Journal of Kidney Diseases suggests a daily dose of 200-1,000 IU 3

In patients with CKD and kidney stones, the American Journal of Kidney Diseases recommends more careful monitoring as kidney function declines, and vitamin D supplementation should be prescribed to correct deficiency/insufficiency but with close monitoring of calcium levels 1, 2, 5
Patients with nephrotic-range proteinuria may require higher vitamin D doses due to urinary losses of vitamin D-binding protein, according to the American Journal of Kidney Diseases 5

The American Journal of Kidney Diseases recommends ensuring adequate hydration and moderate dietary calcium intake (800-1,000 mg/day) when supplementing with vitamin D 1, 5
The American Journal of Kidney Diseases suggests not using active vitamin D analogs (calcitriol, alfacalcidol, etc.) to treat nutritional vitamin D deficiency in stone formers due to higher risk of hypercalciuria 3