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Evidence-Based Supplement Research
Evidence-Based Supplement Research
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Vitamin D and Improved Bone Mineral Density

Research synthesisLow evidenceSmall effect3 studies · 0 beneficial · 3 neutral · 0 harmful

Across 3 studies, all reported neutral small-sized effects of vitamin D supplementation on bone mineral density (BMD), with no statistically significant findings. The median study duration was 297 days, and the evidence is primarily drawn from clinical populations, including kidney transplant recipients and postmenopausal women with type 2 diabetes. No beneficial or harmful effects were observed.

  • Studied populations: kidney transplant recipients (KTRs); postmenopausal women with type 2 diabetes and high fracture risk

Caveats: Evidence base is small (only 3 studies) — conclusions should be considered preliminary. Many of the included studies did not reach statistical significance — effect may be smaller than the predominant direction suggests. All findings were neutral, limiting the ability to identify any effective dose or consistent population-level benefit.

Generated Jun 12, 2026
Time to effect
Median: 9.9 months · IQR 6.5 months–13.4 months · Range 3 months–16.8 months — Reported in 2 of 3 studies
3 of 3 papers
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