Taking high doses of these supplements during pregnancy lowered the future risk that their children would develop croup by as much as 40 percent.
Researchers say vitamin D regulates central nervous system disturbances associated with depression.
All in all, study authors conclude that getting more vitamin D among people with a deficiency may reduce chronic inflammation.
According to a new study, taking vitamin D supplements does nothing to prevent bone fractures in most healthy individuals.
Medics say the vitamin, which people also pick up from sunlight and certain foods, is harmful to those who consume too much of it.
The world-first study discovered that cases of dementia could drop by nearly a fifth if people who are deficient in vitamin D take more supplements.