[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-studies-list:{\"conditionNormalized\":\"gastrointestinal-transit-time\",\"overallStatus\":[\"RECRUITING\",\"AVAILABLE\",\"NOT_YET_RECRUITING\"],\"orderBy\":\"LastUpdateSubmitDate:desc\",\"size\":25,\"offset\":0}":3,"health-study-condition:gastrointestinal-transit-time":28},{"pageToken":4,"total":5,"offset":6,"count":5,"results":7},null,1,0,[8],{"id":9,"slug":10,"hasResults":11,"nctId":12,"briefTitle":13,"officialTitle":14,"acronym":15,"eligibilityCriteria":16,"healthyVolunteers":17,"sex":18,"minAge":19,"maxAge":20,"enrollmentInfo":21,"targetDuration":24,"studyType":25,"phases":4,"briefSummary":26,"conditions":27,"keywords":29,"overallStatus":33,"whyStopped":4,"lastUpdateSubmitDate":34,"lastUpdatePostDateStruct":35,"startDateStruct":38,"completionDateStruct":40,"leadSponsor":42,"locationsCount":5},"100616718","a-study-on-gastrointestinal-transit-time-at-the-population-level-100616718",false,"NCT07309250","A Study on Gastrointestinal Transit Time at the Population Level","Gastrointestinal Transit Time at the Population Level: A Cross-sectional Study","GITTPop","Inclusion Criteria:\n\n1. 18-65 years old\n2. 18.5 kg\u002Fm² ≤ BMI ≤ 25 kg\u002Fm² or BMI ≥ 30 kg\u002Fm² (people with normal weight or obesity)\n3. Provision of informed consent to participate.\n\nExclusion Criteria:\n\n1. 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;\n2. Using medications which effect gastric motility (e.g., domperidone, erythromycin, metoclopramide, prucalopride, opiates, loperamide, …)\n3. The ingredients of blue muffins include gluten, nuts, baking powder, sugar, vanilla extract and sunflower oil. Participants with allergies to these ingredients;\n4. Current diagnosis of cancer;\n5. 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;\n6. Immobility;\n7. Neuromuscular degenerative conditions associated with muscular atrophy, such as myasthenia gravis, muscular dystrophies, fibromyalgia, or multiple Sclerosis;",true,"ALL","18 Years","65 Years",{"count":22,"type":23},932,"ESTIMATED","5 Days","OBSERVATIONAL","The goal of this study is to investigate the baseline of gastrointestinal transit time (GITT) and explore its relationship with other health indicators in 932 healthy adult volunteers.\n\nThe main questions it aims to answer are:\n\nWhat are the population-level baseline values for GITT using the blue dye method? How is GITT associated with key physiological parameters including blood metabolic markers, life style, and stool characteristics?\n\nParticipants will:\n\nConsume a standardized blue dye muffin after overnight fasting at the research center; Offer a finger prock blood samples for metabolic profiling; Collect stool samples for moisture measurement; Complete detailed questionnaires on diet, lifestyle, and bowel habits; Record the time of first blue stool appearance to determine GITT.",[28],"Gastrointestinal Transit Time",[30,31,32],"Gastrointestinal motility","Baseline study","Reference value","RECRUITING","2026-10-05",{"date":36,"type":37},"2026-10-06","ACTUAL",{"date":39,"type":37},"2025-12-01",{"date":41,"type":23},"2026-12-30",{"name":43,"class":44},"KU Leuven","OTHER"]