Bone health

Vitamin D

Vitamin D contributes to calcium absorption and bone health; fracture results depend on population and co-supplementation.

moderate evidence

Direction: increase

Magnitude: unknown

Human evidence reviewed

Study context

Population: Adults, especially older adults

Studied dose: Varies or not established

Duration: Varies across reviewed studies

Last reviewed: 2026-09-16

Limitations & caveats

  • Vitamin D plus calcium findings do not isolate vitamin D alone.

Sources

NIH ODS: Vitamin D — Health Professional Fact SheetExpert or government fact sheet · NIH Office of Dietary Supplements · supportsOpen ↗

Source type and claim strength are separate. A fact sheet summarizes underlying research; its link is not an individual clinical trial.