Apple cider vinegar: surprising new weapon against kidney stones?
NCT ID NCT07389226
First seen Jun 27, 2026 · Last updated Jul 08, 2026 · Updated 2 times
Summary
This study will test whether taking apple cider vinegar every day for a short time changes the chemistry of urine in adults, both those with a history of calcium oxalate kidney stones and healthy volunteers. Researchers will measure levels of citrate, pH, calcium, and calcium oxalate in urine to see if ACV might help prevent stones. The study plans to enroll 30 participants and is not yet recruiting.
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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 30 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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Dec 2026
An estimate. Start dates often move.
- Expected to finish
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Feb 2028
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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Accepted
You do not need to have the condition being studied to take part.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Controls: Adults above the age of 18. * Kidney stone patients: Adults above the age of 18. * History of majority (\>50%) calcium oxalate kidney stones Exclusion Criteria: * Anyone with a history of calcium phosphate stones (\>50% calcium phosphate), uric acid stones, struvite stones, recent urinary tract instrumentation (\<30 days), or recurrent urinary tract infections. * Any individual who has had ACV outside of normal consumption in the prior month will be excluded. * Any individual who has a history of a negative reaction (increased acid reflux, allergy) to ACV will also be excluded. * Any individual with chronic kidney disease, underlying acid base disorder will also be excluded.
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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 places running it
1 site. The list below names each one and where it is.
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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.
Contacts and locations
Locations
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The University of Chicago
Chicago, Illinois, 60637, United States
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