Effect of Fruit and Vegetable Intake on Markers of Fruit and Vegetable Consumption (BIOFAV)

November 22, 2012 updated by: Jayne Woodside, PhD, Queen's University, Belfast

Effect of Increased Fruit and Vegetable Intake on Biomarkers of Fruit and Vegetable Consumption

This study will examine what contribution of 'markers' of fruit and vegetable (FV) intake in blood and urine is most closely related to FV intake. 30 healthy volunteers will be fed either 2, 5 or 8 portions of FV per day for 4 weeks (ten participants per group, randomly assigned). Volunteers will have all their food provided during the study, and will consume two meals each weekday at the University. Volunteers will complete diet and lifestyle questionnaires at the start and end of the study and will have blood and urine samples collected at 0, 2 and 4 weeks.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Single biomarkers of FV consumption, such as Vitamin C and certain carotenoids and flavonoids, have been proposed, but associations between these compounds and FV intake are relatively weak. The investigators propose that, given the complexity of FV, production of an algorithm based on a wide variety of bioactive compounds found in FV might better predict FV consumption. A controlled feeding study (30 volunteers randomised to 2, 5 or 8 portions of FV day for 4 weeks) will allow development of such an algorithm. Volunteers will be recruited by advertisement from QUB and the general public, and will have all their food provided for the 4 week period (two meals per day during the week to be consumed under supervision at the University).

Study Type

Interventional

Enrollment (Anticipated)

30

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United Kingdom
      • Belfast, United Kingdom, BT12 6BJ
        • Queen's University Belfast

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 65 years (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • 18-65 years
  • Usual consumption of fruit and vegetables <= 2 portions/day

Exclusion Criteria:

  • Use of any high dose vitamin, mineral or dietary supplements
  • Current smoker
  • BMI > 35 kg/m2
  • Inability to provide informed consent
  • Excessive alcohol consumption (>28 Units/week men or >21 Units/week women)
  • Food sensitivities or allergies that would interfere with a tolerance of a fruit and vegetable rich diet
  • Medical conditions or dietary restrictions that would substantially limit inability to complete the study requirements

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Basic Science
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: 2 Portions
Dietary supplement: 2 portions of fruit and vegetables per day
Consume 2 portions of fruit and vegetables per day
Other Names:
  • 2 portions/day
Experimental: 5 portions
Dietary supplement: 5 portions of fruit and vegetables per day
Consume 5 portions of fruit and vegetables per day
Other Names:
  • 5 portions/day
Experimental: 8 portions
Dietary supplement: 8 portions of fruit and vegetables per day
Consume 8 portions of fruit and vegetables per day
Other Names:
  • 8 portions/day

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Change in biomarkers of fruit and vegetable consumption
Time Frame: Baseline and 4 weeks
Baseline and 4 weeks

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Queen's University, Belfast

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

June 1, 2011

Primary Completion (Actual)

November 1, 2012

Study Completion (Actual)

November 1, 2012

Study Registration Dates

First Submitted

April 27, 2012

First Submitted That Met QC Criteria

May 2, 2012

First Posted (Estimate)

May 3, 2012

Study Record Updates

Last Update Posted (Estimate)

November 27, 2012

Last Update Submitted That Met QC Criteria

November 22, 2012

Last Verified

November 1, 2012

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • 11/07

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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