Now another study suggests taking vitamin D supplements during pregnancy may reduce the risk of breathing problems in children.
In the study, doctors measured the amount of vitamin D in the cord blood of more than 900 babies, then followed those children to age five.
Based on their results, it seems babies with higher levels of vitamin D were two times less likely to have had a respiratory infection, such as bronchitis, compared to the babies with lower levels of the vitamin.
However, the extra vitamin D did not have an effect on the asthma rates.
The study is published in the journal Pediatrics and the researchers plan on doing follow-up studies.
