Effects of a Single Dose of Wild Blueberries on Mood and Executive Function in Healthy Emerging Adults: a Single-Blind, Randomized Controlled Trial
Trial Snapshot
- Phase
- Not Applicable
- Status
- Recruiting
- Sponsor
- University of Reading
- Enrollment
- 80
- Locations
- 1
- Primary Endpoint
- Positive affect as measured by PANAS-X
Study Overview
Brief Summary
This study aims to investigate whether consuming a drink containing powdered blueberries (equivalent to 150 g of fresh fruit) can improve mood and executive function in healthy emerging adults.
Detailed Description
The present study will examine the psychological effects of a single dose of freeze-dried wild blueberries using a randomized, single-blind, placebo-controlled design. A total of 80 participants will be randomly allocated to consume either a drink prepared with 22 g blueberry powder or a drink prepared with 22 g placebo powder matched for macronutrients, flavour and colour.
Study Design
- Study Type
- Interventional
- Allocation
- Randomized
- Intervention Model
- Parallel
- Primary Purpose
- Prevention
- Masking
- Double (Participant, Outcomes Assessor)
Eligibility Criteria
- Ages
- 18 Years to 25 Years (Adult)
- Sex
- All
- Accepts Healthy Volunteers
- Yes
Inclusion Criteria
- •18 to 25 years of age
Exclusion Criteria
- •Any medically significant condition or mental health disorder (e.g. diabetes, endocrine or gastrointestinal disorders)
- •Taking medication (excluding hormonal contraception or medication for asthma/seasonal allergies)
- •Allergy to blueberries or any other Vaccinium species
Arms & Interventions
Blueberry drink
Intervention: Blueberry drink (Dietary Supplement)
Placebo drink
Intervention: Placebo drink (Dietary Supplement)
Outcomes
Primary Outcomes
Positive affect as measured by PANAS-X
Time Frame: 1.5 hours post-ingestion
Positive affect will be calculated by adding the values of the 21 positive items of the Positive and Negative Affect Schedule-X and the additional item "motivated". Thus, the scale will range from 0 to 88 points with higher scores indicating better mood.
Secondary Outcomes
- Reaction time(1.5 hours post-ingestion)
- Executive function (accuracy)(1.5 hours post-ingestion)
- Negative affect as measured by PANAS-X(1.5 hours post-ingestion)
Investigators
Prof Claire Williams
Prof. Claire Williams
University of Reading