Prenatal vitamin d may shield kids from asthma
NCT ID NCT00856947
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tests whether giving mothers high-dose vitamin D (2400 IU daily) from week 24 of pregnancy until one week after birth can prevent asthma symptoms like wheezing in their children. 600 mothers from the ABC cohort in Denmark are participating. The children are followed for several years to see if they develop persistent wheeze or asthma.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
Vitamin D3 (cholecalciferol)
What this could lead to
If it works, this could point toward a simple way to reduce asthma risk in children by giving vitamin D to mothers during pregnancy.
What could go wrong
This is an early-phase study, so results are uncertain. The effect may be small or not appear at all, and the high dose might have unknown side effects.
Disclaimer
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This is a summary of
the original study
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Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
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Locations
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Copenhagen University Hospital of Copenhagen
Gentofte Municipality, Gentofte, 2820, Denmark
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Næstved Hospital, Pediatric Department
Næstved, Næstved, 4700, Denmark