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Healthy volunteers help unravel Kidney's role in Stone-Forming oxalate

NCT ID NCT04437225

Knowledge-focused Sponsor: University of Alabama at Birmingham Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing This study
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Aug 28, 2026 · Updated 2 times

Summary

This study looks at how the kidneys turn a substance called glycolate into oxalate, which can form kidney stones. Fifteen healthy adults will eat a special low-oxalate diet and receive a harmless tracer to track this process. The goal is to better understand how oxalate is made in the body, which could help prevent kidney stones in the future.

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

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

About 15 people

The number the study aims to enrol. It can still change while the study runs.

Started

Mar 2020

Expected to finish

Dec 2030

An estimate. End dates often move.

Lead sponsor

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

18 to 75 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show 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: * Mentally competent adults, able to read and comprehend the consent form * 18-75 years of age * Body Mass Index (BMI) between 19 and 40 * In good health as judged from a medical history, reported medications, and a complete blood metabolic profile * Acceptable 24 hour urine collections (performed twice for screening) Exclusion Criteria: * History of any hepatic, renal, bowel, or endocrine disease or any other condition that may influence the absorption, transport or urine excretion of ions * Abnormal urine chemistries or blood metabolic profiles * Poor 24 hour urine collections completed during screening, judged by 24 hour urine creatinine excretion (indicative of not collecting all urine in the 24 hour period) * Pregnancy, intention to become pregnant in the near future, or lactation * Aged \<18 or \>75 * BMI \<19 or \>40

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Conditions

The condition(s) this trial relates to.

Kidney Calculi urolithiasis

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Healthy

Contacts and locations

Locations

  • University of Alabama at Birmingham

    Birmingham, Alabama, 35233, United States

More trials for these conditions

Other studies related to the condition(s) this trial covers.