NCT06833736

Brief Summary

This study is a pilot trial of a smartphone app to promote sustainable and healthy eating, running for 10 weeks. The app aims to promote general wellbeing in the working population. The investigators are interested in the feasibility and acceptability of the plant-based recipes and information pages, so the focus will be on how people engage with these features and how they meet their needs. Participants will be randomised into three groups:

  1. 1.General information (no app).
  2. 2.Standard app (app as it stands).
  3. 3.Enhanced app with recipes and behaviour change recommendations (app + messages).

Trial Health

87
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
147

participants targeted

Target at P75+ for not_applicable

Timeline
Completed

Started Feb 2025

Shorter than P25 for not_applicable

Geographic Reach
1 country

1 active site

Status
completed

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

Study Start

First participant enrolled

February 5, 2025

Completed
5 days until next milestone

First Submitted

Initial submission to the registry

February 10, 2025

Completed
9 days until next milestone

First Posted

Study publicly available on registry

February 19, 2025

Completed
5 months until next milestone

Primary Completion

Last participant's last visit for primary outcome

July 14, 2025

Completed
Same day until next milestone

Study Completion

Last participant's last visit for all outcomes

July 14, 2025

Completed
Last Updated

March 10, 2026

Status Verified

February 1, 2025

Enrollment Period

5 months

First QC Date

February 10, 2025

Last Update Submit

March 6, 2026

Conditions

Mobile Health Technology (mHealth)NutritionSustainability

Keywords

NutritionDietSustainabilitySustainable dietsHealthy eatingmHealthMobile appsBehaviour changeInterventionRecipe analysisAcceptabilityFeasibilityRandomised controlled trialPilot trial

Outcome Measures

Primary Outcomes (1)

  • Adherence to intervention

    Number of days participants log on to the app, measured using the app analytics

    From enrolment to the end of the intervention at 8 weeks

Secondary Outcomes (2)

  • Change in legume intake

    Enrolment and at the end of the intervention at 8 weeks

  • Change in meat intake

    Enrolment and at the end of the intervention at 8 weeks

Study Arms (3)

Control group

ACTIVE COMPARATOR
Behavioral: General information

Intervention group 1

EXPERIMENTAL
Device: App

Intervention group 2

EXPERIMENTAL
Device: App + messages

Interventions

AppDEVICE

As the app has not been evaluated before in terms of its impact on dietary change, the first intervention group will have the app as it stands. The overall aim of the app is to improve general wellbeing across several health-related domains, which is achieved through engaging with its main features (the daily plan, journal, user profile, and chat function).

Intervention group 1
App + messagesDEVICE

The plant-forward recipes and information pages available on the app will be made more salient for app users in this group through sending them via targeted messages in the chat function at specific times. Each day, the information pages will be sent at 09:30 and the recipes will be sent at 13:00.

Intervention group 2
General informationBEHAVIORAL

The (no app) control group will be sent general health and sustainability information via email immediately after randomisation is done. To incentivise participation in both baseline and follow-up assessments, the control group will be offered lifetime access to the app and a summary of their self-reported food intake at week 10. The control group will be sent one email reminder halfway through (week 5) to remind them that they are involved in the study, provide them with instructions on the follow-up assessment, and that they will receive the intervention and dietary feedback at week 10.

Control group

Eligibility Criteria

Age18 Years+
Sexall
Healthy VolunteersYes
Age GroupsAdult (18-64), Older Adult (65+)

You may qualify if:

  • Have a personal (not work) smartphone
  • Have access to WiFi at home
  • Have an out-of-home data package
  • Be 18 years of age or older

You may not qualify if:

  • Underweight for their age and gender
  • Follow a restrictive diet (e.g., pregnant, breastfeeding, food intolerant/allergic, attempting to lose weight, diabetes, cardiovascular disease, or other long-term disease including eating disorders)
  • Have a mental disability or learning difficulty

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

London School of Hygiene & Tropical Medicine

London, United Kingdom

Location

Study Design

Study Type
interventional
Phase
not applicable
Allocation
RANDOMIZED
Masking
SINGLE
Who Masked
OUTCOMES ASSESSOR
Purpose
PREVENTION
Intervention Model
PARALLEL
Sponsor Type
OTHER
Responsible Party
SPONSOR

Study Record Dates

First Submitted

February 10, 2025

First Posted

February 19, 2025

Study Start

February 5, 2025

Primary Completion

July 14, 2025

Study Completion

July 14, 2025

Last Updated

March 10, 2026

Record last verified: 2025-02

Data Sharing

IPD Sharing
Will share

The investigators plan to upload IPD and related data dictionaries available on LSHTM's data repository called Data Compass.

Shared Documents
STUDY PROTOCOL, SAP, ICF, ANALYTIC CODE
Time Frame
Beginning 3 months and ending 10 years after the publication of results.
Access Criteria
The data will be provided to other researchers for use in secondary research upon reasonable request through LSHTM's Data Compass repository. The provision of data will be subject to information being provided on the research objectives and ethics status of the project. Ethical approval will need to be sought before receiving the data.

Locations

GB(1)