Blue muffin study reveals secrets of your Gut's speed
NCT ID NCT07309250
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study will measure how long it takes for food to move through the digestive system in 932 healthy adults. Participants will eat a blue-dyed muffin and record when their stool first turns blue. Researchers will also check blood sugar, body fat, and lifestyle habits to see how they relate to gut transit time. The goal is to establish normal values and better understand digestive health.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- What this could lead to
- If successful, this could help establish normal gut transit time ranges and inform future research on digestive health.
- What could go wrong
- This is an observational study, not a treatment trial. It won't directly lead to a new therapy or cure.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Participants
-
About 932 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
-
Dec 2025
An estimate. Start dates often move.
- Expected to finish
-
Dec 2026
An estimate. End dates often move.
- Lead sponsor
-
Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
Who is studied
Healthy volunteers from the Flanders region who volunteered to participate in the research
- Ages
-
18 to 65 years
- Sex
-
Anyone
- Healthy volunteers
-
Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: 1. 18-65 years old 2. 18.5 kg/m² ≤ BMI ≤ 25 kg/m² or BMI ≥ 30 kg/m² (people with normal weight or obesity) 3. Provision of informed consent to participate. Exclusion Criteria: 1. Gastrointestinal conditions which may affect nutrient absorption or gastric emptying, including coeliac disease, Crohn's disease, previous resection of the small intestine other than bariatric surgery, gastroparesis; 2. Using medications which effect gastric motility (e.g., domperidone, erythromycin, metoclopramide, prucalopride, opiates, loperamide, …) 3. The ingredients of blue muffins include gluten, nuts, baking powder, sugar, vanilla extract and sunflower oil. Participants with allergies to these ingredients; 4. Current diagnosis of cancer; 5. Advanced organ failure, including chronic kidney disease Stage 5, liver cirrhosis Child-Pugh B or C, intestinal failure, heart failure stage D, or chronic obstructive pulmonary disease stage 4; 6. Immobility; 7. Neuromuscular degenerative conditions associated with muscular atrophy, such as myasthenia gravis, muscular dystrophies, fibromyalgia, or multiple Sclerosis;
Get updates
Get notified about this study
Sign up to get updates when this study changes or when new studies for Gastrointestinal transit time are added.
Genom att skicka in godkänner du våra Användarvillkor
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
-
The places running it
1 site. The list below names each one and where it is.
-
The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
-
A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
-
Department of Chronic Diseases and Metabolism
Leuven, Flemish Brabant, 3000, Belgium