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Can grocery receipts unlock the secrets of obesity treatment?

NCT ID NCT04788836

Knowledge-focused Sponsor: Lia Bally 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Aug 05, 2026 · Last updated Aug 06, 2026 · Updated 1 time

Summary

This study investigates how obesity treatments, such as bariatric surgery or medication, influence food purchasing habits in daily life. Researchers will collect digital receipts from loyalty cards and have participants fill out questionnaires over several years. By analyzing these receipts, they aim to see if treatments lead to healthier food choices. The study includes adults with obesity who are undergoing or have recently started treatment.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Collection of digital receipts from grocery shopping and questionnaires
What this could lead to
If successful, this could reveal how obesity treatments like surgery or medication change real-world food purchases, guiding better support for healthier eating.
What could go wrong
This is an observational study, so it cannot prove cause and effect. Results may be limited by the accuracy of receipt data and 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

61 people

The number who actually took part.

Started

Nov 2021

Finished

Dec 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

A minimum of 60 (up to a maximum of 150) overweight/obese adults planned for or who started surgical or non-surgical obesity treatment within the past 6 months will be recruited for this study. Participants will be recruited by referral from our outpatient endocrine clinic and collaborating Centres of Excellence for Metabolic Surgery.

Ages

18 years and older

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: * Female and male subjects aged 18 years or older * Proficient in German (including written) * BMI≥30kg/m2 or BMI≥28kg/m2 with adiposity-related comorbidities (prediabetes, type 2 diabetes mellitus, hypertension, dyslipidemia) * Referred for obesity treatment or who started obesity treatment within 6 months (surgical or non-surgical) * Primary grocery shopping at the Swiss biggest grocery retailers (Coop, Migros), and regularly using a loyalty card (Cumulus and/or Supercard) Exclusion Criteria: * Incapacity to give informed consent * Primary shopping in other food retailers (e.g. Aldi, Lidl, outside of Switzerland, etc.)

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Conditions

The condition(s) this trial relates to.

Food Preferences Obesity obesity disorder

As listed by the trial registrant

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

Food preferences Obesity

Contacts and locations

Locations

  • Department of Diabetes, Endocrinology, Clinical Nutrition and Metabolism, Inselspital, Bern University Hospital

    Bern, 3010, Switzerland

More trials for these conditions

Other studies related to the condition(s) this trial covers.