No consensus on vitamin D in utero

But the WHO continues to recommend against routine supplementation

There is insufficient evidence to guide recommendations on the use of vitamin D supplements in pregnancy, say Canadian researchers.

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And they suggest that’s unlikely to change anytime soon.

Their analysis of 43 randomised controlled trials involving 8406 women found substantial variation among the results.

The results show that taking supplements during pregnancy increased vitamin D levels in both the mother’s bloodstream and umbilical cord blood, but the researchers did not consistently find that higher doses of vitamin D