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 2026-10-13 (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.
Italy
Researchers investigate walking on a split-belt treadmill as an approach to uneven walking patterns.
Testing a treatment or activity
Ages 18 years to 70 years · Does not accept healthy volunteers
Switzerland
Researchers investigate a rehabilitation approach that uses personalised stimulation to address movement difficulties in Parkinson’s.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
Netherlands
Researchers are investigating whether ambroxol changes the course of Parkinson's in people with a particular genetic change.
Testing a treatment or activity
Age range not listed · Ask the team who can join
United States
Researchers investigate relationships between exercise and inflammation in older adults and people with Parkinson’s.
Testing a treatment or activity
Ages 30 years to 85 years · Also accepts healthy volunteers
Germany
Researchers compare exercise approaches to investigate effects on learning, memory and thinking in people with Parkinson’s.
Testing a treatment or activity
Ages 50 years to 80 years · Does not accept healthy volunteers
Czech Republic
Researchers study the safety and tolerability of a home device that stimulates a nerve through the skin in people with Parkinson’s or essential tremor.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
Taiwan
Researchers investigate how different stimulation approaches affect freezing of gait during walking tasks of varying difficulty in Parkinson’s.
Testing a treatment or activity
Ages 20 years to 90 years · Also accepts healthy volunteers
United States
Researchers test whether automated speech feedback with added noise helps people with Parkinson’s speak more clearly and take part in social activities.
Testing a treatment or activity
Ages 50 years to 80 years · Does not accept healthy volunteers
Taiwan
Researchers investigate a probiotic containing Clostridium butyricum bacteria for movement and other symptoms in Parkinson’s.
Testing a treatment or activity
Ages 20 years to 90 years · Does not accept healthy volunteers
United States
Researchers study a self-completed online thinking test designed to track changes over time while reducing the effects of remembering earlier test questions.
Learning by observing or collecting information
Age 50 years and over · Also accepts healthy volunteers
Italy
Researchers are testing an oral extract containing THC and CBD and measuring safety and quality of life.
Testing a treatment or activity
Age range not listed · Ask the team who can join
China
Researchers repeat brain scans using a tracer called AV-133 to follow changes in people with early Parkinson’s or signs that may precede it.
Learning by observing or collecting information
Age 30 years and over · Ask the team who can join
Spain
Researchers measure pesticides in urine and compare early signs associated with Parkinson’s to investigate links between exposure and risk.
Learning by observing or collecting information
Ages 45 years to 55 years · Also accepts healthy volunteers
United States
The University of Delaware collects details of people willing to be contacted about future Parkinson’s research studies.
Learning by observing or collecting information
Ages 21 years to 100 years · Does not accept healthy volunteers
United States
Researchers study genetic differences that may increase the risk of Parkinson’s and related conditions.
Learning by observing or collecting information
Age 18 years and over · Also accepts healthy volunteers
Denmark
Researchers test whether 12 weeks of high-intensity aerobic exercise can reduce persistent tiredness in people with Parkinson’s.
Testing a treatment or activity
Age 40 years and over · Does not accept healthy volunteers
China
Researchers compare acupuncture with a comparison treatment for constipation related to Parkinson’s.
Testing a treatment or activity
Ages 35 years to 80 years · Does not accept healthy volunteers
Italy
Researchers investigate how genetic differences in Parkinson’s relate to thinking abilities and behaviour.
Learning by observing or collecting information
Age 18 years and over · Ask the team who can join
Italy
Researchers follow people with Parkinson’s over time after deep brain stimulation, using tests and questionnaires to assess thinking and behaviour.
Learning by observing or collecting information
Ages 18 years to 70 years · Ask the team who can join
Italy
Researchers study whether changes in the GBA gene relate to how people with Parkinson’s respond to treatment that stimulates thinking skills.
Learning by observing or collecting information
Ages 18 years to 80 years · Does not accept healthy volunteers
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: 2026-10-13
4689 related source records before matching duplicates
Import available
Last complete check: 2026-10-13
4384 related source records before matching duplicates
Import available
Last complete check: 2026-10-13
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.