Clinical trial Recruiting at 1 site Interventional Ages 18 and up

Early vitamin D3 supplementation for critically ill patients

Official title: Effects of Early Vitamin D3 Supplementation on Clinical Outcomes for Critically Ill Patients

Run by National Taiwan University Hospital · NCT05937789 · Data updated 2026-11-12

This study tests if giving vitamin D3 early to critically ill patients with low levels can improve their health while they are in the ICU.

Quick facts

Study typeInterventional
Ages18 Years and up
SexAll
Enrollment240 (estimated)
SponsorNational Taiwan University Hospital
Academic / other
Locations1 site (Taipei)
StatusRecruiting
StartedJanuary 22, 2024
Main results expectedJune 30, 2026
Study endsDecember 31, 2026
Registry record updatedAugust 16, 2024
Trial IDNCT05937789 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are critically ill patients aged 18 and older with serum 25(OH)D levels below 20 ng/mL and expected ICU stays of at least 72 hours.

Probably not a fit

Patients with conditions affecting calcium metabolism, recent high-dose vitamin D therapy, or active COVID-19 will not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This clinical trial evaluates the effects of early vitamin D3 supplementation on critically ill patients with low calcidiol levels. Conducted in Taiwan, it aims to enroll 240 patients who will receive varying doses of vitamin D to maintain serum calcidiol levels above 30 ng/mL within 30 days of ICU admission. The study measures serum calcidiol and PTH levels at multiple time points to assess the impact of supplementation on patient outcomes. The findings will help establish guidelines for vitamin D treatment in critically ill patients.

Why it matters

Potential benefit: If successful, this study could improve clinical outcomes and reduce complications for critically ill patients with vitamin D deficiency.

How similar studies have gone: Previous studies have shown that vitamin D supplementation can reduce in-hospital mortality and infection rates in severely deficient patients, indicating potential success for this approach.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* ≥18-year-old critically ill patient.
* ICU admission \< 24 hours.
* Baseline 25(OH)D levels within 24 hours of ICU admission \< 20 ng/mL.
* Expected ICU length of stay ≥ 72 hours.

Exclusion Criteria:

* Hypercalcemia (ie. total serum calcium levels \> 2.6 mmol/L).
* Disorders affecting serum 25(OH)D levels, calcium metabolism, or bone metabolism (eg, parathyroid disease, rickets, or severe cirrhosis \[Child C\]).
* Having received high-dose vitamin D3 therapy (ie. \> 2,000 IU daily or a single dose of ≥ 10,000 IU) within the past four weeks.
* Active COVID-19 at ICU admission.
* Organ transplant.
* Having had tuberculosis, sarcoidosis or kidney stones within the past year.
* Having renal dialysis, continuous kidney replacement therapy (CKRT), acute kidney injury (AKI).
* Having ICU admission within the past three months.
* Non-native-speaking patients and their families
* Pregnant women.

Where it's running

  • National Taiwan University Hospital
    Taipei, Taiwan
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.