Carbon-13 clinical trials
How each study uses Carbon-13 is sorted by a rule, right about nine times in ten. Readers can ask us to read every study one by one.Ask us to read each study
Get an email when these change. Save the Carbon-13 studies recruiting or about to start — once a week, free: studies that open, close, add sites or post results.
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Example · made-up studies
Breast cancer · Recruiting: 2 came in, 3 changed
What changed in your saved searches, Oct 31 – Nov 6:
A study of drug A after surgery for early breast cancer
Came in · now Recruiting
Drug B with hormone therapy in advanced breast cancer
Changed
· Sites: 4 added, including Seoul and Busan
· Enrollment: 300 → 450 participants
Exercise during chemotherapy
Now Active, not recruiting
One email a week for all your saved searches. Stop any time.
Approvals
The first approval found in each region, with its record
- United States
- Not in FDA's approval records
- European Union
- Not in EMA's list of EU-wide authorisations
From FDA's Drugs@FDA and Purple Book (through openFDA) and the European Medicines Agency, files of Sept 2026 and 27 Oct 2026. National approvals in Europe and other countries are not included. How this is worked out
How studies write it
Studies that test it under each name
Studies by the year they started
8 studies that test it; most in 2017 (2)
| Year | Studies |
|---|---|
| 2010 | 1 |
| 2014 | 1 |
| 2016 | 1 |
| 2017 | 2 |
| 2021 | 1 |
| 2023 | 1 |
| 2025 | 1 |
By phase
A phase 1/2 study counts in both.
What it is tested for
Each study’s main condition, where its own words name it, so a study counts once.
Who runs them
Industry 2 · Other 6
University of Alabama at Birmingham (2) · Otsuka Pharmaceutical Co., Ltd. (2) · Sunnybrook Health Sciences Centre (2) · University of California, San Francisco (1) · Robert Flavell, MD, PhD (1)
Coming up
From the study records. Dates are the sponsors’ own estimates and often move.
Reaching primary completion within a year · 1
Studies that test Carbon-13.
- Dec 2026Oxalate Formation From Ascorbic AcidNot applicable · University of Alabama at Birmingham
Studies
Open first, then newest update. How each study uses Carbon-13 is read from its arms, and is right about nine times in ten. Ask us to read each study. These are the studies that list it as an intervention; a search of ClinicalTrials.gov also finds studies that mention it only in a description, such as earlier treatment.
Testing it · 8
- Magnetic Resonance (MR) Imaging With Hyperpolarized Bicarbonate (13C) to Measure Tissue pH in Prostate CancerRecruitingEarly Phase 1Robert Flavell, MD, PhDNCT05851365Written as Hyperpolarized Bicarbonate (13C)
- Endogenous Oxalate Synthesis in Idiopathic Calcium Oxalate Kidney Stone DiseaseRecruitingNot applicableUniversity of Alabama at BirminghamNCT06989320Written as Oral 13C- ascorbic acid dosing
- Oxalate Formation From Ascorbic AcidActive, not recruitingNot applicableUniversity of Alabama at BirminghamNCT04603898Written as Carbon-13 Ascorbic Acid Oral Load
- Study to Evaluate the Feasibility of 13-C Pyruvate Imaging in Breast Cancer Patients Receiving Neoadjuvant ChemotherapyWithdrawnPhase 1Sunnybrook Health Sciences CentreNCT03121989Written as Hyperpolarized Pyruvate (13C) Injection
- Multiparametric MRI for Prostate Cancer Localization and Characterization Using Hyperpolarized Pyruvate (13C) InjectionWithdrawnPhase 1Sunnybrook Health Sciences CentreNCT02647983Written as Hyperpolarized Pyruvate (13C) Injection
- A Trial of C13-CAC Breath Test in PPI Resistant GERD PatientsCompletedPhase 2Otsuka Pharmaceutical Co., Ltd.NCT03284177Written as Calcium (13C)Carbonate
- Hyperpolarized Pyruvate Injection in Subjects With Prostate CancerCompletedPhase 1University of California, San FranciscoNCT01229618Written as Hyperpolarized Pyruvate (13C) injection
- Comparison Study Between C13-CAC Breath Test and 24-hour Gastric pH MonitoringCompletedPhase 2Otsuka Pharmaceutical Co., Ltd.NCT02225067Written as Calcium (13C)Carbonate
Codes
What other systems call Carbon-13 · ClinicalTrials.gg INT000630
- MeSH (NLM) C000615229Carbon-13One source NLM
- UNII (FDA) FDJ0A8596DCARBON C-13Confirmed NLM, Wikidata
- Wikidata Q1770822carbon-13Confirmed NLM, Wikidata
| System | Code | Name there | Checked by |
|---|---|---|---|
| MeSH (NLM) | C000615229 | Carbon-13 | One source NLM |
| UNII (FDA) | FDJ0A8596D | CARBON C-13 | Confirmed NLM, Wikidata |
| Wikidata | Q1770822 | carbon-13 | Confirmed NLM, Wikidata |
“Confirmed” means two independent publishers link the code to this drug; “one source”, one does and its name agrees.