What you’ll do

You will be asked to use a mobile phone app to keep a record of what you eat. For some participants, this app will also provide personalised feedback in the form of advice and recipes.

Whilst using the app, you'll be required to complete several questionnaires and wear a continuous glucose monitor.

Before and after you use the app, you'll visit the Centre for Nutrition, Exercise and Metabolism's laboratories at the University of Bath.

We will ask you to provide a few extra measurements to give us a snapshot of your metabolic health. These include blood and saliva samples, as well as height, weight and blood pressure measurements.

What you’ll get for completing the study

On completion of the study, you will receive £200.

We will also provide you with detailed feedback about your metabolic health. You will also have access to a mobile phone app that normally requires a paid subscription.

Your data

Your data will be treated as confidential. Nobody outside the research team will be able to see your name or contact details — you'll be allocated a project code instead. We'll keep all information about you safe and secure.

After the study, we will keep some of the data to check the results. When we write the report, it will be done so in a way that you won't be identifiable.

Ethical approval

This project has been given a favourable ethics opinion by the University of Bath, Biomedical Science Research Ethics Committee [reference: 8028-11785].

Eligibility

To take part, you must:

• be aged between 18 and 45
• consume fewer than 2.6 servings of vegetables-per-day
• want to consume more vegetables in your diet
• be willing to use a mobile app (and have access to a suitable smartphone or tablet) to receive information and log all daily meals
• be willing to cook (yourselves or partner) at least one main meal at home for at least five days-per-week

You can't participate if you:

• have been in a nutritional or biomedical trial in the last month
• frequently travel (more than twice monthly) to countries with time zones four or more hours different from GMT
• consume more than 14 (female) or 21 (male) units of alcohol weekly
• have recently started or changed your nicotine habits
• are planning pregnancy in the study period
• are lactating or have been lactating in the past six weeks
• follow a medically prescribed, slimming, or self-prescribed diet that restricts vegetable consumption
• have had a body mass change of more than 5% in the last three months
• have a history of major depressive disorders and/or current use of antidepressive/antianxiety medication
• have a clinically diagnosed sleep disorder and/or use prescribed sleep medication
• take medication that may pose undue personal risk or introduce bias
• are employed by a company developing personalised diet applications, including Salus Optima or Unilever