Findings

What do systematic reviews say?

3 questions · 3 findings · 1 reviews

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Vitamin D vs placebo or control

Bone mineral density in forearm · children

Meta-analysis of randomised trials of vitamin D supplementation for Bone mineral density in forearm, Healthy children: SMD 0.04 (95% CI -0.36 to 0.45), not statistically significant. Umbrella review outcome-level evidence grade: Substantial effect unlikely.

1 finding from 1 review

Vitamin D and multiple health outcomes: umbrella review of systematic reviews and meta-analyses of observational… 2014 All outcomes
Healthy children
SMD 0.04 [-0.36, 0.45]
3 studies
GRADE not reported

Vitamin D vs control

Bone mineral density in forearm · Community dwelling adults

The meta-analysis of RCTs reported a WMD of -0.70 (95% CI 1.70 to 0.40) for vitamin d supplementation versus control.

1 finding from 1 review

Vitamin D and multiple health outcomes: umbrella review of systematic reviews and meta-analyses of observational… 2014 All outcomes
WMD -0.70 [-1.70, 0.40]
2 studies
GRADE not reported

Vitamin D vs placebo or control

Bone mineral density in forearm · Older or community-dwelling adults

Meta-analysis of randomised trials of vitamin D supplementation for Bone mineral density in forearm, Community-dwelling adults: WMD -0.70 (95% CI -1.70 to 0.40), not statistically significant. Umbrella review outcome-level evidence grade: No conclusion.

1 finding from 1 review

Vitamin D and multiple health outcomes: umbrella review of systematic reviews and meta-analyses of observational… 2014 All outcomes
Community-dwelling adults
WMD -0.70 [-1.70, 0.40]
2 studies
GRADE not reported