Saliva swab may predict weight loss drug success
NCT ID NCT06814938
First seen Jun 27, 2026 · Last updated Jul 17, 2026 · Updated 2 times
Summary
This study tests whether a biomarker found in saliva can predict how much weight people with obesity will lose when taking semaglutide. Researchers will compare weight changes in biomarker-positive and biomarker-negative participants over 24 weeks. The goal is to personalize obesity treatment, making it more effective and efficient.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- Semaglutide
- What this could lead to
- If successful, this could lead to a simple saliva test that tells doctors which patients will benefit most from semaglutide for weight loss.
- What could go wrong
- This is a small, early-stage study focused on prediction, not a new treatment. The biomarker may not reliably predict response in real-world settings.
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.
- Phase
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Phase 4
Runs after approval, following long-term safety and how well the treatment works in everyday use.
- Participants
-
About 135 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Feb 2025
- Expected to finish
-
Nov 2028
An estimate. End dates often move.
- Lead sponsor
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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.
- Ages
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18 to 65 years
- Sex
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Anyone
- Healthy volunteers
-
Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
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: \- Obesity (BMI ≥30 kg/m2) without or with controlled chronic conditions (e.g., controlled hypertension). Exclusion Criteria: * Weight changes greater than 3% in the previous 3 months * History of bariatric surgery including lap band and bariatric endoscopy * Significant untreated psychiatric dysfunction based upon screening with the Hospital Anxiety and Depression Inventory (HAD), Questionnaire on Eating and Weight Patterns (binge eating disorders and bulimia) and Columbia Suicide Severity Rating Scale (C-SSRS). If such a dysfunction is identified by an anxiety or depression score \>11 or difficulties with substance or eating disorders, the participant will be excluded and given a referral letter to his/her primary care doctor for further appraisal and follow-up. Any suicidal ideation of type 4 or 5, any suicide attempt during the patient's lifetime, or any suicidal behavior in the last month. * Current use of anti-obesity medications or GLP1R agonists for Type 2 Diabetes * Any contraindication to FDA-approved GLP1R agonists * A person who is pregnant or wanting to become pregnant * Once the positive or negative cohort is filled at 2:1 ratio, some patients will be screen failed if their gene cohort is full. * A family member who is enrolled in this study. * Principal Investigator Discretion
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Mayo Clinic in Florida
Jacksonville, Florida, 32224, United States
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Mayo Clinic in Rochester
Rochester, Minnesota, 55905, United States
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