Blocking stress hormones may reveal why overeating leads to fat gain
NCT ID NCT06556277
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looked at whether stress hormones (glucocorticoids) released after eating contribute to fat gain in overweight people. Twenty-three overweight men were given either a drug combination that blocks these hormones or a placebo while overeating for a week. Researchers measured changes in body fat to understand the hormone's role.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- Metyrapone and hydrocortisone
- What this could lead to
- If successful, this could help explain why some people gain fat when overeating, potentially pointing to new ways to prevent obesity.
- What could go wrong
- This is a small, early-stage study with only 23 participants, so results may not apply to everyone. It is designed to understand biology, not to test a treatment.
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
-
Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
-
23 people
The number who actually took part.
- Started
-
Sep 2024
- Finished
-
Feb 2026
- 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.
- Ages
-
18 to 50 years
- Sex
-
Male participants only
- 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: * Males aged 18 to 50 years * BMI≥ 25 kg/m² with a stable weight within past three months before study initiation Exclusion Criteria: * Any severe acute or chronic disease, including diabetes mellitus type 2 * Intake of GLP-1 agonists or hormone therapy * Hypercortisolism * Casual smoking (more than 6 cigarettes per day) * Frequent, heavy alcohol consumption (more than 30g/day) * Frequent, heavy caffeine consumption (more than 4 caffeinated drinks/day) * Regular physical exercise (more than 4hrs per week) * Shift work * Participation in an investigational drug trial within the past two months * Intake of any steroid-containing drugs, including topical steroids and inhalers, within 4 weeks of the study initiation * Known allergy to metyrapone * Inability or unwillingness to provide informed consent
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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
-
University Hospital Basel
Basel, Canton of Basel-City, 4031, Switzerland
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