One dose before surgery: could vitamin B3 shield kidneys?
NCT ID NCT07739290
First seen Jul 31, 2026 · Last updated Jul 31, 2026
Summary
This trial tests whether a single high dose of nicotinamide (a form of vitamin B3) taken on the morning of heart surgery can reduce the risk of acute kidney injury afterward. The study enrolls 20 adults undergoing coronary bypass or valve surgery with a heart-lung machine who are at higher risk for kidney damage. Half receive the supplement and half receive a placebo, and researchers measure a kidney injury marker in urine to see if the supplement shows promise.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- nicotinamide (NAM), a form of vitamin B3, given as a single 3000 mg oral dose
- What this could lead to
- If this pilot succeeds, it could pave the way for a larger trial and potentially a simple, low-cost way to protect kidneys during heart surgery.
- What could go wrong
- This is a small pilot study focused on feasibility, not proof of effectiveness. The single dose may not be enough, and results may not generalize to all patients.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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About 20 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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Sep 2026
An estimate. Start dates often move.
- Expected to finish
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Jan 2029
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: 1. Age ≥18 years 2. Undergoing coronary artery bypass graft (CABG) and/or valve surgery with cardiopulmonary bypass (CPB) at BIDMC. Includes combination surgeries that involve CABG and/or valve plus other procedures (e.g., Maze procedure, aortic aneurysm repair). 3. AKI risk score ≥6 at the time of screening Exclusion Criteria: 1. History of AKI in the seven days prior to surgery, defined as any of the following: * Increase in serum creatinine ≥0.3 mg/dl in 48h * Increase in serum creatinine ≥50% in 7d (if no value available in last 7d, use most recent value in last 3 months) * Urine output ≤0.5 ml/kg/h x 6 consecutive hours (only assessed in patients with hourly monitoring via Foley catheter) * Receipt of renal replacement therapy (RRT) within 7d 2. Advanced chronic kidney disease (eGFR \<15 ml/min/1.73m2 or end-stage kidney disease receiving RRT) 3. Pregnant or breastfeeding\* 4. Positive COVID test in the last 10 days. 5. Prisoner or institutionalized 6. Existing or anticipated durable VAD 8\. Conflict with other studies 9\. Previous usage of nicotinamide supplements in the past 30 days
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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.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
More trials for these conditions
Other studies related to the condition(s) this trial covers.
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- ICU kidney injury: does the pattern predict lasting damage?
- Can a kidney ultrasound scan warn of kidney damage after heart bypass surgery?
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- Can watching kidney oxygen during liver surgery keep kidneys safe?