Research · Meta-analysis
The effects of vitamin D on skeletal muscle strength, muscle mass, and muscle power: a systematic review and meta-analysis of randomized controlled trials
What it found
A small but significant effect on muscle strength (SMD ~0.17, larger in those 65+), with no significant effect on muscle mass or power.
- Design
- Meta-analysis
- Year
- 2014
- Sample size
- 5,615
- Population
- adults across 30 RCTs (subgroup aged 65+)
- Intervention
- vitamin D supplementation vs placebo/control
- Outcome
- muscle strength, mass, and power
- Journal
- Journal of Clinical Endocrinology & Metabolism
Citation last checked 2026-06-21.