Plain-English translation of NCT05043116 on ClinicalTrials.gov ↗ · Source last updated · Translation generated · How we translate trials
Phase 2 — Testing in a bigger group (up to a few hundred people) to see if the treatment actually works and is still safe.
This study is testing whether vitamin D3 supplements can help prevent asthma attacks in young children. Children with asthma-like symptoms will receive either a daily dose of vitamin D3 or a placebo (a pill with no active ingredient) for one year. Researchers want to see if the medication can reduce how often children have breathing problems and need hospital visits.
Many young children have repeated asthma attacks that send them to the hospital, and current treatments don't work for everyone. This study explores whether this medication might help prevent these dangerous breathing episodes from happening in the first place.
You likely qualify if…
You likely don't qualify if…
Your child will receive a daily oral suspension (liquid) to take by mouth for one year—either containing vitamin D3 or a placebo that looks and tastes identical. You won't know which one your child is receiving. You'll attend follow-up visits where doctors monitor your child's asthma symptoms and any breathing problems, tracking whether the treatment helps reduce hospital visits and acute asthma episodes.
AI-generated summary from trial data · Jun 20, 2026 · Not medical advice
Denmark
Phase
Testing effectiveness
Sponsor
Copenhagen Studies on Asthma in Childhood
Enrollment target
~320 participants
Started
October 2022
Primary completion
October 2028
Age range
12 Months – 71 Months
Last updated on clinicaltrials.gov in April 2025.
Reach out to the team running this trial. Response times vary — some teams are faster than others.
Central contact
Klaus Bønnelykke, MD, PhD
chawes@copsac.com
Tell us you're interested and we'll help connect you with the research team. We'll walk you through what to expect first — no email needed to get started.