Findings

What do systematic reviews say?

2 questions · 2 findings · 1 reviews

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No studies found 0 · 0%GRADE not reported 0 · 0%Very low 1 · 50%Low 0 · 0%Moderate 1 · 50%High 0 · 0%

Vitamin D vs placebo or no intervention

Gestational diabetes · pregnant women and their infants..

Vitamin D supplementation probably leads to lower gestational diabetes compared with placebo or no intervention (moderate certainty).

1 finding from 1 review

Vitamin D supplementation for women during pregnancy 2019 · Cochrane Headline outcomes only
RR 0.51 [0.27, 0.97]
4 studies · 446 participants
Moderate

Vitamin D plus calcium vs placebo or no intervention

Gestational diabetes · pregnant women and their infants..

It is very uncertain whether vitamin D + calcium supplementation changes gestational diabetes compared with placebo or no intervention (very low certainty).

1 finding from 1 review

Vitamin D supplementation for women during pregnancy 2019 · Cochrane Headline outcomes only
RR 0.33 [0.01, 7.84]
1 study · 54 participants
Very low