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Breath sensor weight loss program shows Real-World results over two years

NCT ID NCT07430618

Disease control Sponsor: University of British Columbia 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study looked at over 11,500 adults with overweight or obesity who used a breath acetone sensor and mobile app to track weight and learn healthy habits. Researchers analyzed existing data to see how much weight users lost after 12, 24, 52, and 104 weeks. The goal was to understand if this program helps people achieve and maintain meaningful weight loss in real life.

What this could mean

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

Active substance
breath acetone biofeedback device with mHealth program
What this could lead to
If successful, this could show that a simple breath sensor and app help people lose weight and keep it off long-term.
What could go wrong
This is an observational study without a comparison group, so weight loss may be due to other factors. Results rely on self-reported 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

11,524 people

The number who actually took part.

Started

Nov 2018

Finished

Apr 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

Commercial users of the Key to Health digital weight loss program (mobile app) who enrolled and used the program during the data collection window. Users are members of the general community who accessed the program through routine commercial availability (direct-to-consumer), and who recorded weight measurements during typical use of the app and/or a connected scale. De-identified backend program data were used for this retrospective analysis.

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: * Adults aged ≥18 years at program start/onboarding * Program start date between November 2018 and April 2023 * Valid baseline (onboarding) self-reported weight recorded * Baseline BMI \>25 kg/m² * At least one valid post-baseline weight entry recorded after onboarding (manual and/or connected scale) Exclusion Criteria: * Missing or invalid baseline weight * Biologically implausible baseline weight (per prespecified data-quality checks) * No post-baseline weight data recorded after the baseline date/onboarding timestamp

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Conditions

The condition(s) this trial relates to.

Obesity obesity disorder Overweight Weight Loss

As listed by the trial registrant

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

Obesity & overweight Obesity (body mass index >30 KG/M2) Overweight (bmi > 25)

Contacts and locations

Locations

  • UBC Okanagan

    Kelowna, British Columbia, V1V 1V7, Canada

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