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Environmental Harm Menu Labels and Overall Dietary Quality
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
- Control (QR Code) Menu Labels (behavioral)
- Traffic-Light Style Environmental Harm Menu Labels (behavioral)
Sponsor: Johns Hopkins Bloomberg School of Public Health · Participants: 450 · Started: Nov 2, 2026
Contact the study team
- Nina Carr, MPH, MBA · Phone: 240-405-2823
- Julia Wolfson, PhD, MPP · Phone: 213-359-2915
Official record on ClinicalTrials.gov — NCT07910617
Locations in the U.S.
| Maryland | Johns 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.