Vitamin D Improves Bone Density After Kidney Transplantation: Study
According to a new research, Post-transplant nutritional vitamin D supplementation increased serum 25-hydroxyvitamin D [25(OH)D] levels and improved femoral neck bone mineral density (BMD) T-scores in kidney transplant recipients. Although parathyroid hormone (PTH) levels showed a downward trend, the reduction was not statistically significant. These findings suggest vitamin D may benefit post-transplant bone health, but its overall role in preventing or treating post-transplant bone disease remains uncertain and requires further research.
A high prevalence of vitamin D deficiency and insufficiency has been documented among individuals who have undergone kidney transplantation. The efficacy of post-transplantation vitamin D therapy remains inconclusive when examined through isolated studies. Therefore, a meta-analytic approach was employed to consolidate current literature and assess the influence of vitamin D supplementation on recipient outcomes following renal transplantation.
Included were randomized controlled trials and prospective cohort studies related to kidney transplantation, as well as research examining the impact of regular vitamin D supplementation on outcomes following kidney transplantation.
8 studies ultimately satisfied selection criteria for this review. The temporal scope of included studies stretched from 2005 to 2025, encompassing patient populations between 79 and 536 recipients per investigation. Post-baseline surveillance periods diverged substantially, measuring 12 through 24 months. Vitamin D was administered at daily doses between 800 IU and 7000 IU. Supplementation produced significant elevation in 25(OH)D concentrations. A downward trend in parathyroid hormone levels was observed following vitamin D supplementation, though this reduction did not reach statistical significance. Notably, this was achieved safely without provoking hypercalcemia. Post-operative femoral neck bone mineral density T-score additionally showed improvement with vitamin D intervention.
Post-transplant nutritional vitamin D supplementation increased serum 25(OH)D levels and improved femoral neck bone mineral density t-score in kidney transplant recipients. A downward trend in parathyroid hormone was observed but did not reach statistical significance. Whether vitamin D supplementation improves post-transplant bone disease remains uncertain and requires further investigation.
Reference:
Yang, BQ., Bai, YJ., Li, YM. et al. Impact of vitamin D supplementation on the outcomes of kidney transplant recipients: a systematic review and meta-analysis. BMC Nephrol (2026). https://doi.org/10.1186/s12882-026-05198-0
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