Could vitamin d help heart surgery patients recover better?
NCT ID NCT04986033
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looked at 135 adults having off-pump coronary artery bypass surgery to see if vitamin D levels affect hemoglobin (a protein in red blood cells) recovery after surgery. Researchers measured vitamin D and a hormone called hepcidin, which controls iron use. The goal was to understand why many patients develop anemia after heart surgery and whether vitamin D plays a role.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
What this could lead to
If successful, this could help doctors understand why some patients develop anemia after heart surgery and point to vitamin D as a potential way to improve recovery.
What could go wrong
This is an observational study, not a treatment trial. It only looks for links between vitamin D and hemoglobin, so it won't prove that giving vitamin D helps. Results may not apply to all heart surgery patients.
Disclaimer
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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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Division of Cardiac Anesthesiology, Department of Anesthesiology and Pain Medicine, Cardiovascular Hospital, Severance Hospital, Yonsei University College of Medicine, Seoul, South Korea
Seoul, South Korea