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After gastric bypass, do your senses sabotage your diet?

NCT ID NCT07290075

Knowledge-focused Sponsor: Hanife Köksal Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looked at 101 adults who had weight-loss surgery at least three months earlier. Researchers asked about changes in taste and smell, and how those changes relate to hunger and diet quality. The goal is to understand whether sensory shifts make it harder to eat well after surgery.

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 this study finds clear links, it could help doctors better understand why some people struggle with eating habits after weight-loss surgery.
What could go wrong
This is a small, completed observational study, not a treatment trial. It cannot prove cause and effect, and results may not apply to everyone.

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

101 people

The number who actually took part.

Started

Jan 2024

Finished

Jan 2025

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

Adults aged 18-65 years who have undergone bariatric surgery (Sleeve Gastrectomy or Roux-en-Y Gastric Bypass) at least 3 months prior to enrollment, recruited from patients followed in clinical nutrition and bariatric surgery outpatient clinics.

Ages

18 to 65 years

Sex

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

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Adults aged 18 to 65 years * History of bariatric surgery (Sleeve Gastrectomy or Roux-en-Y Gastric Bypass) * At least 3 months post-surgery at the time of study enrollment * Able and willing to provide informed consent Exclusion Criteria: * Pregnancy * History of neurological disorders affecting taste or smell * Active upper respiratory infection at the time of assessment * Severe psychiatric disorders that may impair participation

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Conditions

The condition(s) this trial relates to.

anosmia Obesity obesity disorder olfactory nerve disorder Taste Disorders

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Obesity Smell disorder Taste disorders

Contacts and locations

Locations

  • Istanbul University, Faculty of Medicine, Department of Endocrinology and Metabolism

    Istanbul, Capa, 34093, Turkey (Türkiye)

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