Research across borders

Worldwide Study Finder

Where are peptides being studied? Explore registered human studies by product, phase, condition and location — from early development through Phase 4, alongside studies where phase does not apply.

Searchable results come from ClinicalTrials.gov and include international sites. For broader coverage, use the worldwide and regional registries below. No single registry captures every study.

Find studies Explore world registries Peptide directory

Find a study

Enter a peptide, product, condition or location. Try generic names, brand names and development codes separately. Results are registry search matches, not automatically verified links to a WPF peptide record.

Search terms are sent to ClinicalTrials.gov and appear in the page URL. Do not enter personal or medical identifying information. Registry records are served with up to a one-hour cache; registry updates themselves can lag real-world changes.

Registry search results

4 matching registry records; showing 4 on this page, newest registry updates first. Search checked 2026-11-08 17:39 UTC. Counts are registry matches, not unique peptides or a worldwide total.

Not applicableActive, not recruitingINTERVENTIONAL

Prandial Metabolic Phenotype in Adults

ClinicalTrials.gov · NCT05400733 · Registry updated: 2026-10-05

Condition / research focus: Protein Metabolism
Sponsor: Texas A&M University
Countries with listed sites: United States
Registry dates and results: Start: 2022-06-24. Completion: 2027-09 (may be estimated). No results posted in this registry response.

Products and interventions (6)

Includes comparators and combinations. A search match is not a verified peptide identity or evidence of benefit.

Total Amino Acids (dietary_supplement)
Essential Amino Acids (dietary_supplement)
Essential Amino Acids + Hydroxy-methylbutyric acid (HMB) (dietary_supplement)
Essential Amino Acids + Leucine (dietary_supplement)
Essential Amino Acids High (dietary_supplement)
Placebo Water (dietary_supplement)

Where the study takes place — 1 listed sites

Site status can differ from overall study status. This list includes all reported sites, even when your search specifies one location. Confirm availability and eligibility with the study team through the original record.

Human Clinical Research Facility
College Station, Texas, United States
Site recruitment: Not reported

Original record, eligibility, contacts and results →

Phase not reported / not applicableUnknownOBSERVATIONAL

Plasma Free Amino Acids in Patients With Hepatic Encephalopathy

ClinicalTrials.gov · NCT03306498 · Registry updated: 2017-10-11

Condition / research focus: Hepatic Encephalopathy
Sponsor: Assiut University
Countries with listed sites: No country reported
Registry dates and results: Start: 2017-12-15. Completion: 2019-02-15 (may be estimated). No results posted in this registry response.

Products and interventions (1)

Includes comparators and combinations. A search match is not a verified peptide identity or evidence of benefit.

Aminoleban (8% amino acids infusion) (drug)

Where the study takes place — 0 listed sites

The registry does not list facilities in this record. This does not mean the study has no sites.

Original record, eligibility, contacts and results →

Not applicableCompletedINTERVENTIONAL

The Effect of Acute Tryptophan Depletion (ATD) on Esophageal Sensitivity in Healthy Volunteers

ClinicalTrials.gov · NCT03017768 · Registry updated: 2017-06-28

Condition / research focus: Esophageal Sensitivity
Sponsor: Universitaire Ziekenhuizen KU Leuven
Countries with listed sites: Belgium
Registry dates and results: Start: 2016-06. Completion: 2017-03-24 (may be estimated). No results posted in this registry response.

Products and interventions (3)

Includes comparators and combinations. A search match is not a verified peptide identity or evidence of benefit.

Acute tryptophan depletion (dietary_supplement)
Placebo (dietary_supplement)
Multimodal stimulation probe (device)

Where the study takes place — 1 listed sites

Targid, KU Leuven
Leuven, Vlaams-Brabant, Belgium
Site recruitment: Not reported

Original record, eligibility, contacts and results →

Not applicableCompletedINTERVENTIONAL

The Role of Serotonin in Hot Flashes After Breast Cancer

ClinicalTrials.gov · NCT00228943 · Registry updated: 2015-04-14

Condition / research focus: Breast Cancer
Sponsor: Indiana University
Countries with listed sites: United States
Registry dates and results: Start: 2005-07. Completion: 2008-11 (may be estimated). Results are posted in this registry.

Products and interventions (2)

Includes comparators and combinations. A search match is not a verified peptide identity or evidence of benefit.

Acute tryptophan depletion (dietary_supplement)
Half-strength tryptophan depletion (Control) (dietary_supplement)

Where the study takes place — 1 listed sites

Indiana University Cancer Center
Indianapolis, Indiana, United States
Site recruitment: Not reported

Original record, eligibility, contacts and results →

Explore the world’s study registries

These links open external registries; their records are not merged into the results above. WHO ICTRP provides a broader search across contributing registries. Search the same generic name, aliases and development codes in relevant regions. One multinational study may appear in more than one registry, so compare registration identifiers before counting it twice.

Worldwide

Africa

Pan African Clinical Trial Registry ↗

Americas

Asia

Middle East

Europe

Oceania

Australia / New Zealand — ANZCTR ↗

Registry directory checked October 5, 2026 against the WHO registry network. This is a starting point, not complete coverage of every country or continent. Record availability, language and update schedules vary by registry.

Worldwide Study Finder

Loading registry information…

Worldwide Study Finder

Where are peptides being studied? Explore registered human studies by product, phase, condition and location — from early development through Phase 4, alongside studies where phase does not apply.

Searchable results come from ClinicalTrials.gov and include international sites. For broader coverage, use the worldwide and regional registries below. No single registry captures every study.

Find a study

Registry search results

4 matching registry records; showing 4 on this page, newest registry updates first. Search checked 2026-11-08 17:39 UTC. Counts are registry matches, not unique peptides or a worldwide total.

Not applicableActive, not recruitingINTERVENTIONAL

Prandial Metabolic Phenotype in Adults

ClinicalTrials.gov · NCT05400733 · Registry updated: 2026-10-05

Condition / research focus: Protein Metabolism
Sponsor: Texas A&M University
Countries with listed sites: United States
Registry dates and results: Start: 2022-06-24. Completion: 2027-09 (may be estimated). No results posted in this registry response.

Products and interventions (6)

Includes comparators and combinations. A search match is not a verified peptide identity or evidence of benefit.

Total Amino Acids (dietary_supplement)
Essential Amino Acids (dietary_supplement)
Essential Amino Acids + Hydroxy-methylbutyric acid (HMB) (dietary_supplement)
Essential Amino Acids + Leucine (dietary_supplement)
Essential Amino Acids High (dietary_supplement)
Placebo Water (dietary_supplement)

Where the study takes place — 1 listed sites

Human Clinical Research Facility
College Station, Texas, United States
Site recruitment: Not reported

Original record, eligibility, contacts and results →

Phase not reported / not applicableUnknownOBSERVATIONAL

Plasma Free Amino Acids in Patients With Hepatic Encephalopathy

ClinicalTrials.gov · NCT03306498 · Registry updated: 2017-10-11

Condition / research focus: Hepatic Encephalopathy
Sponsor: Assiut University
Countries with listed sites: No country reported
Registry dates and results: Start: 2017-12-15. Completion: 2019-02-15 (may be estimated). No results posted in this registry response.

Products and interventions (1)

Includes comparators and combinations. A search match is not a verified peptide identity or evidence of benefit.

Aminoleban (8% amino acids infusion) (drug)

Where the study takes place — 0 listed sites

The registry does not list facilities in this record. This does not mean the study has no sites.

Original record, eligibility, contacts and results →

Not applicableCompletedINTERVENTIONAL

The Effect of Acute Tryptophan Depletion (ATD) on Esophageal Sensitivity in Healthy Volunteers

ClinicalTrials.gov · NCT03017768 · Registry updated: 2017-06-28

Condition / research focus: Esophageal Sensitivity
Sponsor: Universitaire Ziekenhuizen KU Leuven
Countries with listed sites: Belgium
Registry dates and results: Start: 2016-06. Completion: 2017-03-24 (may be estimated). No results posted in this registry response.

Products and interventions (3)

Includes comparators and combinations. A search match is not a verified peptide identity or evidence of benefit.

Acute tryptophan depletion (dietary_supplement)
Placebo (dietary_supplement)
Multimodal stimulation probe (device)

Where the study takes place — 1 listed sites

Targid, KU Leuven
Leuven, Vlaams-Brabant, Belgium
Site recruitment: Not reported

Original record, eligibility, contacts and results →

Not applicableCompletedINTERVENTIONAL

The Role of Serotonin in Hot Flashes After Breast Cancer

ClinicalTrials.gov · NCT00228943 · Registry updated: 2015-04-14

Condition / research focus: Breast Cancer
Sponsor: Indiana University
Countries with listed sites: United States
Registry dates and results: Start: 2005-07. Completion: 2008-11 (may be estimated). Results are posted in this registry.

Products and interventions (2)

Includes comparators and combinations. A search match is not a verified peptide identity or evidence of benefit.

Acute tryptophan depletion (dietary_supplement)
Half-strength tryptophan depletion (Control) (dietary_supplement)

Where the study takes place — 1 listed sites

Indiana University Cancer Center
Indianapolis, Indiana, United States
Site recruitment: Not reported

Original record, eligibility, contacts and results →