TAKE PART IN RESEARCH
Research explained in everyday language. Explore what teams around the world are trying to learn, who can take part and how to get in touch.
See worldwide coverage and update dates ↓Studies with early results appear under “Results reported” even if recruitment continues.
Registry records retrieved 2026-10-14 (UTC). Individual records may have older updates. Recruitment and eligibility must be confirmed with the study team.
A location is a starting point. Ask the team whether that site is accepting people and whether you can take part from where you live.
Introductions are AI-written from the registry in everyday language and have not been independently checked by a clinician. Open any study for its full name, original description and participation rules.
Studies name Parkinson’s or a related condition. Some include other conditions or healthy volunteers. Country filters use sites with matching or unreported status. A country recorded by WHO does not confirm an open local site.
China
This preliminary study compares a probiotic-based treatment with placebo and measures Parkinson's symptoms.
Testing a treatment or activity
Ages 40 to 75 · Ask the team who can join
China
Researchers are comparing rehabilitation approaches involving several professionals and ongoing movement support in Parkinson's.
Learning by observing or collecting information
Age range not listed · Ask the team who can join
China
Researchers are examining the retina and a protein in tears as possible aids to diagnosis.
Research study
Age range not listed · Ask the team who can join
China
Researchers are investigating cells associated with the sense of smell as an experimental treatment for Parkinson's.
Testing a treatment or activity
Ages 40 to 80 · Ask the team who can join
China
This study tests Shengyang Yiwei granules alongside usual treatment. Benefits remain to be established.
Testing a treatment or activity
Age range not listed · Ask the team who can join
China
This study compares gut microbes and brain scans in people with Parkinson's with and without mild thinking changes.
Research study
Ages 18 to 60 · Ask the team who can join
China
Researchers are collecting symptoms, laboratory measures and thinking assessments over time.
Research study
Age range not listed · Ask the team who can join
China
This study examines relationships between symptom classifications, gut microbes and other markers in Parkinson's.
Research study
Age range not listed · Ask the team who can join
China
Researchers are testing rehabilitation approaches alongside medicine for people with speech or walking difficulties.
Testing a treatment or activity
Age 45 and over · Ask the team who can join
China
This study compares a gut bacteria preparation with placebo in people with Parkinson's.
Testing a treatment or activity
Ages 50 to 80 · Ask the team who can join
China
Researchers are collecting stool samples from people with Parkinson's, their spouses and healthy comparison volunteers.
Learning by observing or collecting information
Ages 34 to 81 · Ask the team who can join
China
This study tests different magnetic stimulation patterns and measures recognition of expressions in early Parkinson's.
Research study
Age range not listed · Ask the team who can join
China
Researchers are studying a traditional exercise programme and following changes in bacteria, balance and walking.
Learning by observing or collecting information
Age range not listed · Ask the team who can join
China
This study compares deep brain stimulation settings in people with Parkinson's.
Research study
Ages 18 to 65 · Ask the team who can join
China
This study investigates bladder measurements and compares a medicine with placebo in Parkinson's.
Testing a treatment or activity
Ages 45 to 80 · Ask the team who can join
China
This long-term observational study examines health factors associated with heart, circulation and related diseases.
Learning by observing or collecting information
Age 18 and over · Ask the team who can join
China
Researchers are studying dexmedetomidine and its effects on brain activity and clinical measurements in Parkinson's.
Testing a treatment or activity
Age range not listed · Ask the team who can join
China
Researchers are testing a specific needle-treatment approach and measuring symptoms and quality of life.
Testing a treatment or activity
Ages 40 to 75 · Ask the team who can join
China
This study investigates detailed brain images that may help identify signs of Parkinson's.
Research study
Age range not listed · Ask the team who can join
China
Researchers are studying variations in genes to better understand how Parkinson's develops.
Research study
Age range not listed · Ask the team who can join
WORLDWIDE COVERAGE
Studies are imported from ClinicalTrials.gov, WHO’s international collection and the European CTIS registry. WHO brings together national and regional registries, including records from Asia, Africa and Latin America. Recruiting and upcoming listings have English introductions; older records awaiting an introduction show their registry title.
We aim for broad worldwide coverage, but no registry includes every study. Unregistered studies, reporting delays and missing translations can leave gaps. A missing paper does not mean that no results exist.
Import available
Last complete check: 2026-10-14
4690 related source records before matching duplicates
Import available
Last complete check: 2026-10-14
4384 related source records before matching duplicates
Import available
Last complete check: 2026-10-14
73 related source records before matching duplicates
These dates show when WHO processed a registry’s data, not when every study was last updated. WHO’s “not recruiting” label does not distinguish planned, completed and follow-up studies.
Source attribution: WHO ICTRP ↗. The source records and processing dates remain available on each study page. English registration fields are preferred; original descriptions may include local-language material. Registry imports and paper matching run daily. New or changed descriptions enter an editorial queue.