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Environmental Harm Menu Labels and Overall Dietary Quality

RecruitingHealthy volunteers welcome

Longitudinal Trial Evaluating the Influence of Environmental Harm Menu Labels on Overall Dietary Quality

Who can join

Ages 18 to 64 · All sexes · Healthy volunteers welcome

Full eligibility criteria
Inclusion Criteria:

* Aged 18 to 64 years
* Consumes fast food two or more times per month
* Willing to eat meat
* Lives or works within the greater Washington, D.C./Baltimore metropolitan area, defined as the counties and county equivalents within the Baltimore-Columbia-Towson, MD and Washington-Arlington-Alexandria, DC-VA-MD-WV Core Based Statistical Areas (excluding Jefferson County, West Virginia)
* Has access to the internet during the daytime
* Has access to an internet-capable device (smartphone, tablet, or computer)
* Able to send and receive phone calls and text messages at a unique primary phone number (number if not affiliated with a separate prospective or enrolled participant record)
* Available to receive a weekly lunch delivery one day per week (Tuesday-Friday, 11:00 am - 3:00 pm) for seven weeks at a consistent address within the sample frame (this includes screening for potentially disruptive travel plans during ordering period)
* Within the delivery zone for both restaurants in the study
* Willing to complete training on lunch ordering procedures
* Willing and able to complete dietary recalls and surveys

Exclusion Criteria:

* Under 18 years of age
* Over 64 years of age
* Consumes fast food fewer than two times per month
* Pescatarian, vegetarian, or vegan (due to menu content)
* Lives and works outside of the greater Washington, D.C./Baltimore metropolitan area
* Lacks access to the internet during the daytime
* Lacks access to an internet-capable device
* Unable to send and receive phone calls and text messages at a unique primary phone number (phone number is affiliated with a separate prospective or enrolled participant record)
* Lives or works outside the delivery zone for either or both study restaurants
* Unavailable to receive seven weeks of consecutive lunch deliveries on a selected day Tuesday through Friday between 11:00 am and 3:00 pm at a consistent address within the sample frame
* Unwilling to complete training on lunch ordering procedures
* Unwilling or unable to complete dietary recalls and surveys
* Fails verification via Cloudfare Turnstile check when accessing REDCap Interest Survey
* Answers the hidden bot-detection question embedded in the Interest Survey

About the study

The primary objective of this study is to evaluate whether repeated exposure to environmental harm menu labels on fast-food restaurant menus changes overall dietary quality. Participants will be randomized to view either a control (QR code) label or traffic-light style environmental harm labels on two alternating fast-food restaurant menus, and will order one lunch per week for seven weeks through a study ordering website, with each meal delivered to the participant the following day. The outcome is the change in overall dietary quality from baseline to endline, assessed with 24-hour dietary recalls before and after the seven-week ordering period.

What is being tested

Sponsor: Johns Hopkins Bloomberg School of Public Health · Participants: 450 · Started: Nov 2, 2026

Contact the study team

Official record on ClinicalTrials.gov — NCT07910617

Locations in the U.S.

MarylandJohns Hopkins Bloomberg School of Public Health, Baltimore

From ClinicalTrials.gov, data retrieved Nov 15, 2026. Each study sets its own eligibility; the study team decides who can join.