CompletedNot Applicable

Food Swaps to Improve the Healthfulness and Reduce the Carbon Footprint of Grocery Purchases

United States1,201 participantsStarted 2025-05-07

Plain-language summary

The study aims to determine whether viewing health or climate labels (or both) and receiving recommendations for healthier or more climate-friendly swaps (or both) in an online grocery store environment improves the healthfulness and reduces the carbon footprint of consumers' food and beverage purchases compared to shopping as usual without swap recommendations. The online store will record participants' food selections. Participants will also be asked to complete survey measures.

Who can participate

Age range

18 Years

Sex

ALL

See this in plain English?

AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.

Inclusion Criteria: * Aged 18 years or older * Reside in the United States * Able to complete a survey in English * Have internet access to complete the 3 online study visits Exclusion Criteria: * Under the age of 18 * Reside outside of the United States * Unable to complete a survey in English * Do not have internet access to complete the 3 online study visits

Questions worth asking your doctor

Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.

1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?

Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.

Questions for the trial coordinator

The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.

1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?

A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.

What they're measuring

Healthfulness of Product Selection

Timeframe: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)

Carbon Footprint of Participants' Grocery Store Selections

Timeframe: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)

Trial details

NCT IDNCT06648226

SponsorStanford University

Sponsor typeOTHER

Study typeINTERVENTIONAL

Primary completion2025-06-25

Results submitted2026-05-04

View on ClinicalTrials.gov More Food Selection trials