Clinical trials
Breath Tests clinical trials
Below are recruiting breath tests clinical trials, each written for real people, not researchers. We’re tracking 39 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT06764641Recruiting
Breath test for digestive system cancers
This trial studies a simple breath test to detect cancers of the digestive system, including the esophagus, stomach, liver, pancreas, and colon. It is for people who have been referred by their doctor for tests because they have symptoms that might be caused by cancer.
LondonAges 18 years+ - NCT05681689RecruitingPhase 3
Check how well a urea breath test works after H. pylori treatment
This Phase 3 study tests whether a urea breath test can confirm that H. pylori infection has been cleared after recent treatment. If the test works well, it may help doctors confirm cure without needing invasive procedures.
Doral, FloridaAges 18 years+ - NCT04100486Enrolling by invitation
Testing a noninvasive device to measure your body signals
This study uses a noninvasive bioelectronic device to record your body’s automatic (involuntary) signals. The goal is to see how well the device can analyze these signals and how your body responds in a controlled setting.
Manhasset, New YorkAges 18–60 - NCT05276557RecruitingPhase 3
Kids study of a breath test to check H. pylori
This Phase 3 study tests whether a urea breath test (a safe breath test) works well and is safe for children ages 3–17. It may help doctors find and manage an H. pylori infection without using repeated samples.
Doral, FloridaAges 3–17 - NCT06946706Recruiting
Bacteria overgrowth in stomach condition study
This study looks at whether people with autoimmune gastritis (a stomach condition) are more likely to have small intestinal bacterial overgrowth (SIBO), which can cause bloating and other symptoms. It uses a simple breath test and questionnaires.
Shanghai, Shanghai MunicipalityAges 18–65 - NCT05976165Recruiting
Breath testing study for small bowel bacterial overgrowth
This study checks whether breath tests can help identify small intestinal bacterial overgrowth in people with reflux-like symptoms (heartburn or regurgitation). If you qualify, you may be asked to avoid certain medicines and treatments for a short time so the test results are accurate.
Jacksonville, FloridaAges 18 years+ - NCT05586906Recruiting
Breath test to detect lung transplant problems early
This trial looks at a simple, noninvasive breath test to spot early lung transplant dysfunction after a lung transplant. Because it focuses on testing after the transplant, it may help your care team catch issues earlier.
ZurichAges 18 years+ - NCT07724496Recruiting
H. pylori and stomach growth features study
This study looks at whether having H. pylori infection (a common stomach bacteria) and certain features of stomach growth can predict how early stomach cancer or pre-cancerous changes will behave and what your long-term outlook might be. You may be eligible if you are being treated with a camera-based removal procedure called endoscopic submucosal dissection (ESD).
Beijing, Beijing MunicipalityAges 18–80 - NCT05727020Recruiting
Breath test study for pancreatic cancer and related conditions
This study checks whether breathing out certain chemicals (volatile organic compounds) can help identify pancreatic ductal adenocarcinoma (pancreatic cancer) or related pancreas problems. You may qualify if you’re an adult with suspected/confirmed pancreatic conditions and can safely take part in breath testing or surgery-related tissue collection.
LondonAges 18 years+ - NCT05844514Recruiting
Breath test study for colorectal cancer detection and risk
This study tests a breath analysis (a sample you give by breathing into a device) to help detect or better understand colorectal cancer. It may help researchers see whether breath results can identify cancer sooner and in people who haven’t started treatment yet.
LondonAges 18 years+ - NCT06415890Recruiting
4-7-8 breathing for shoulder pain after gallbladder surgery
This study tests whether a simple breathing technique (called 4-7-8 breathing) can help reduce shoulder pain and improve breathing after gallbladder removal surgery. It may be a good fit if you are having planned laparoscopic gallbladder surgery and staying overnight in the hospital.
HatayAges 18 years+ - NCT07038785Recruiting
Can trained dogs find breast cancer from breath?
This trial will see if specially trained dogs can identify breast cancer by smelling breath samples. You would give a breath sample and the dogs will be tested on how well they can detect cancer from it.
Totowa, New JerseyAges 18 years+ - NCT06942312Enrolling by invitation
Liver metabolism study in non-alcoholic fatty liver disease
This trial studies how the liver processes fat in people with non-alcoholic fatty liver disease (NAFLD). It uses MRI scans to look at liver metabolism, which may help doctors understand the disease better and find new treatments.
Helsinki, UusimaaAges 18–75 - NCT06923267Recruiting
Ultrasound to check heart function during breathing trials
This trial tests if using ultrasound to monitor your heart during a breathing test can help predict if you will need the breathing tube again. It is for people on a ventilator for at least 24 hours who are at higher risk of needing the tube reinserted.
OrléansAges 18 years+ - NCT05886803Recruiting
Predicting breathing test success in the ICU
This study uses data from your hospital records to see if a machine learning tool can predict whether a patient will succeed when doctors try to remove their breathing tube during a test of their own breathing.
NiceAges Any age - NCT05727852Enrolling by invitation
Breath and heart tests to study lung disease stiffness
This study uses breath analysis and heart/electrical heart testing to look at how stiff the arteries are in people with long-term lung conditions. It may help researchers better understand lung disease effects on the cardiovascular system.
MoscowAges 18 years+ - NCT06559878Enrolling by invitation
Liver Mitochondria Study in Fatty Liver Disease
This study looks at how the liver's mitochondria (the energy powerhouses of cells) work in people with fatty liver disease. Participants will have an MRI scan and receive a small amount of fat solution through an IV to see how the liver processes fat.
Helsinki, UusimaaAges 18–75 - NCT06285734Recruiting
Trial on small intestinal bacterial overgrowth in people with abdominal bloating
This study looks at whether certain bacteria in the small intestine cause abdominal bloating and distension. It aims to help understand this common problem and find better ways to treat it.
Jinan, ShandongAges 18–60 - NCT05735002Recruiting
Check tests to find chronic bowel blood flow problems early
This study looks at ways to promote early diagnosis of chronic mesenteric ischemia, a condition where the intestines don’t get enough blood over time. If you’re being evaluated for this problem, the trial may help ensure the right diagnosis happens sooner.
Enschede, OverijsselAges 18 years+ - NCT06968234Recruiting
Liver disease breath test study
This study uses a special breath test to learn about chronic liver disease. If you have liver disease or cirrhosis, you may be able to help by providing a breath sample.
Shanghai, Shanghai MunicipalityAges 18 years+ - NCT05973656Recruiting
Study how alcohol affects the risk of mouth cancer
This study looks at how a breakdown product from alcohol (acetaldehyde) may play a role in oral (mouth) cancer. It may help researchers understand who is more affected by alcohol and why.
Minneapolis, MinnesotaAges 18–45 - NCT04475952Recruiting
Diagnosing upper digestive problems earlier during routine care
This study aims to learn how to detect problems in the upper digestive tract earlier. People may be asked to help with diagnosis while they are already undergoing routine tests or treatment, which could improve future care.
LondonAges 18–90 - NCT04974593RecruitingPhase 3
Test breath testing to guide a lactose-free diet in IBS
This trial studies whether a breath test (hydrogen/methane lactose testing) can predict who with IBS will improve on a lactose-free diet. If you have moderate-to-severe IBS and regularly eat lactose-containing foods, the test result may help tailor your diet approach.
Jette, Brussels CapitalAges 18–75 - NCT06081452Recruiting
Public survey on breath testing for health
This trial asks for your opinions on breath testing for health and disease through a public survey. Anyone 18 or older can join—no medical visits or tests needed.
LondonAges 18 years+
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Common questions
- Are there clinical trials for breath tests?
- Yes. Clin2 currently lists 39 recruiting breath tests studies from the U.S. registry, each rewritten for real people, not researchers, so you can see what it’s testing and who it’s for.
- How do I know if I qualify for a breath tests trial?
- Each study lists its eligibility criteria — rules about age, diagnosis, and prior treatments. On every Clin2 trial page we explain these in words written for real people and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Does it cost anything to join a breath tests trial?
- Using Clin2 is always free. Many trials cover the cost of the study treatment and related visits; some reimburse travel. The study team explains exactly what’s covered before you decide.
Related conditions
Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov. Talk with your doctor about whether a specific trial is right for you.