Identifying the Best Tools for Recording Diet in Free-living UK Adults (SODIAT-2 Study)
Investigating a Data-driven Standardized and Objective Dietary Intake Assessment Tool in Free-living Individuals - SODIAT-2 Study
University of Reading
133 participants
Aug 25, 2025
OBSERVATIONAL
Conditions
Summary
The aim of the SODIAT-2 study is to evaluate the effectiveness of dietary intake assessment tools in a real-world setting. These tools include wearable cameras, spot urine samples, capillary blood samples, and a web-based food frequency questionnaire (FFQ). The main questions it aims to answer are: Is the accuracy of dietary assessment improved in free-living environments when a combination of subjective and objective assessments tools are used? Secondary research questions are: Can wearable cameras accurately monitor the daily dietary intake of free-living individuals? Does a combination of capillary blood samples and spot urine samples provide a robust assessment of the nutrient status and habitual dietary exposure in a free-living setting? Can data-driven integration of multiple emerging technologies create a dietary assessment tool that is low burden, accurate and scalable in free-living populations? Can a condensed FFQ estimate diet quality as effectively as a detailed FFQ? Participants will: Use the dietary assessment tools (wearable camera, spot urine, capillary blood, and eNutri FFQ web-app) as instructed over a 5-week period from their home and/or working space. Take part in two monitoring weeks (week 1 and week 5) where they will record their usual dietary intake over 3 days. Consume an identical 3-day study meal plan during the test (calibration) diet week 3, whilst repeating the monitoring week measurements. This study aims to recruit 133 adults living in Great Britain (GB) to better understand how these tools perform outside of a clinical environment.
Eligibility
Inclusion Criteria3
- years and older
- Lives in Great Britain (England, Schotland and Walse)
- Able to read/understand instructions written in English and are fluent in English
Exclusion Criteria16
- Diagnosed or self-report as being underweight (have a body mass index (BMI) of less than 18.5 kg/m2)
- Are unwilling/unable to collect urine and blood samples, use the wearable camera as instructed and/or spend 20-30 min online recording what they've recently had to eat/drink on multiple occasions
- Are unwilling/unable to have a video call with a researcher with cameras turned on
- Are unwilling/unable to post samples on specific days and receive/send a larger parcel at the start/end of the study (note: all return packaging and postage will be provided by us and will include a courier delivery and collection)
- Are unwilling/unable to receive a single grocery delivery from Sainsbury's or Tesco online supermarkets (delivery to be arranged by us), includes living in a postcode area that cannot receive grocery deliveries from Tesco or Sainsburys as well as not having space to refrigerate and freeze items.
- Are unwilling/unable to eat/drink any items on the calibration menu, e.g., food allergies/intolerances, dislike of food items, unable eat (e.g. vegan or have to avoid for a medical condition) or cannot eat 3 meals plus snacks daily (note: vegetarians can take part)
- Are unwilling/unable to avoid taking dietary and herbal supplements for at least 1 week before and during the 5-week study (e.g. fish oils, vitamins, iron, protein shakes, nutrient powders, joint care)
- Are pregnant, may be pregnant or breast-feeding
- Currently experiencing, recovering or at a high risk of an eating disorder (e.g., previous diagnosis, or concerns that you have an unhealthy relationship with food)
- Have a health condition, are taking medication and/or undergoing medical treatment that affects metabolism, appetite and/or ability to eat the calibration menu (e.g. cancer, chemotherapy, diabetes, gastrointestinal disorders (such as inflammatory bowel disease, Crohn's disease), kidney disease, liver disease, HIV or AIDS)
- Are taking any of the following medications: androgens, blood thinners, phenytoin, erythromycin, or thyroid hormones
- Long-term use of any of the following medications: anti-inflammatories (NSAIDS), steroids/corticosteroids or antibiotics (eligible following a 4-week washout after short term use; eligible if use is infrequent)
- Use illicit substances/recreational drugs
- Have been diagnosed with dementia or other conditions affecting memory
- Do not have anyone at home, work, etc. to help them if they require assistance to use the study tools (such as arthritis, Parkinson's disease, sight loss, etc.)
- If the participants have recently taken part in another intervention study, a 4-week washout will be required before they are able to start the study.
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Interventions
During 5-week study, participants will monitor their usual dietary intake during two 3-day periods (on weeks 1 and 5). During week 3 (calibration week) participants will consume a test diet. Wearable camera technology, self-collected blood and urine samples, and online FFQ (eNutri) will be used to monitor food intake during study weeks. Study tools as well as foods/drinks for the test diet will be delivered to each participant and they will be asked to comply with the study procedures in their home or working environment. Participants will post study samples and the study equipment/logs at designated times using pre-paid envelopes or a courier collection, respectively.
Locations(4)
View Full Details on ClinicalTrials.gov
For the most up-to-date information, visit the official listing.
NCT06879574