An Investigation Into the Effects of Blueberry Anthocyanin on Cognitive Functioning and Mood Adolescents.

2017-04-19 06:08:22 | BioPortfolio


The purpose of this study is to determine whether a 4-week dietary intervention with wild blueberry powder can have an effect on cognitive performance in participants aged between 13-17.


Interventions: Flavonoid drink and a matched placebo will be used in this study. Flavonoid drink will contain approximately, 13g of freeze dried wild blueberry powder, containing 250mg of anthocyanin flavonoid, mixed with 170ml water and flavored with 30ml 'Rock's Organic Orange Squash' as it has a low flavonoid content. The placebo drink will contain placebo powder matched for vitamin C (45mg), glucose (4.52g) and fructose (4.79g), mixed with 170ml of water and 30ml 'Rock's Organic Orange Squash'. Participants will be randomly allocated to either placebo or treatment. They will be instructed to consume the drink every morning for 4 weeks. The powder will be prepared and sealed in opaque packets. Participants will be provided with 2 weeks worth of supplies at baseline and then in week 2. Parents will be provided with instructions on how to prepare the drinks in addition to supplies such as opaque straws and containers. Assessment of left-over product will be conducted in 2 weeks to allow for continued compliance verification.

Procedure: the study comprises of a screen and four visits, including a familiarization week and 2 test visits.

1. Screening: Once a school has indicated their interest in aiding with this trial, participants will be given a brief overview of the study and asked to complete a set of questionnaires regarding their mood and general health to confirm suitability for participating in this study. The questionnaires include Mood and Feeling Questionnaire (MFQ) and Revised Child Anxiety and Depression Scale (RCADS).Participants who score 27 or above(depressed) and those who score 14 or below (healthy) on the MFQ will be invited to participate in the second part of the study. Parents of those meeting the criteria will then be contacted to ascertain that each interested volunteer and their parents are willing to participate for the entire duration of the study and to schedule their familiarization visit.

2. Familiarization Visit: Volunteers and their parents'will be invited to their first visit at the location of their choice (Nutritional Psychology Unit at the University of Reading or their school) where they will receive a detailed explanation of the study by the participating research associate and will be asked to sign the informed consent form before any study procedure starts. A log will be kept identifying all participants having signed the informed consent form (ICF) and the participant will be allocated a participant number. Once consent has been given, the participants will then be asked to complete the EPIC Food Frequency Questionnaire so that background flavonoid intakes can be measured prior to the start of the intervention, Rumination Response Scale (RRS) and a General health questionnaire. Their IQ will be assessed using The Wechsler Abbreviated Scale of Intelligence (WASIII). Parents' will also be asked to complete questionnaires, regarding their children mood and behaviors, including Parent version of MFQ, RCADS and ADHD Rating Scale-IV. Finally, participants will be given training on the cognitive test battery (tasks outlined below) that will be used during the study to reduce the chances of 'practice' adversely affecting performance on subsequent test days.

3. Test Visits (Weeks 0, 2 and 4): All of these sessions will be held at times that suit participants' individual needs. The timings of the testing sessions will be consistent for each participant over the 4 weeks. Upon arrival, participants will enquire of any adverse events and any issues with compliance. They will then complete the battery of cognitive tasks consisting of (i) Modified Eriksen Flanker task, (ii) The Keep track task (KTT) and (iii)The Controlled Oral Word Association Test (COWAT), in addition to completing the daily mood measure Positive and Negative Affect Schedule (PANAS). Additionally, the last test session (week 4) participants and their parents' will once again be asked to complete the MFQ, RCADS and RRS mentioned above.

Participants may stop the study treatment without stating any reason at any time during the study. In addition, a participant will be withdrawn from the study if a subject or their parents' request a discontinuation, he/she exhibits a serious adverse event to any component of the test product, an illness emerges and/or the investigator's opinion is that withdrawal is appropriate and in the best interest of the participant. If a participant withdraws from the study, he/she will be encouraged to make a final visit as soon as possible, irrespective of the reason for withdrawal, to complete a final battery of cognitive tasks.

Study Design




Wild Blueberry Powder-13g, Placebo


University of Reading
United Kingdom




University of Reading

Results (where available)

View Results


Published on BioPortfolio: 2017-04-19T06:08:22-0400

Clinical Trials [1635 Associated Clinical Trials listed on BioPortfolio]

Investigating the Acute Effects of Blueberry (Poly)Phenols on Vascular Function and Cognition in Healthy Individuals.

This study aims to determine the effect of blueberry (poly)phenol vs placebo on vascular function and cognitive performance with an insight into cerebral blood flow velocity changes, acros...

The Effect of Wild Blueberry Consumption on Glucose Regulation in Healthy Adults

The objective of the study is to determine how wild blueberry consumption affects glucose regulation, gastrointestinal hormones and satiety in healthy adults.

The Effect of Blueberries on Enhancing Insulin Sensitivity in Humans

The purpose of this study is to evaluate the effect of blueberry powder on insulin sensitivity in obese, non-diabetic, and insulin resistant subjects. The investigators hypothesized that s...

Effects of Blueberry on Gut Microbiota and Metabolic Syndrome

There is growing evidence that nutritional intervention with dietary polyphenols can positively modulate the gut microbiota to improve cardiometabolic health. Whether the beneficial effect...

Suppression of Postprandial Monocyte Activation by Blueberries or Docosahexaenoic Acid in Humans

The overall goal of the research study is to determine whether a high-fat meal causes postprandial (after meal) inflammation, and whether eating n-3 polyunsaturated fatty acids (PUFAs) or ...

PubMed Articles [6396 Associated PubMed Articles listed on BioPortfolio]

Managed and Wild Bee Flower Visitors and Their Potential Contribution to Pollination Services of Low-Chill Highbush Blueberry (Vaccinium corymbosum L.; Ericales: Ericaceae).

Highbush blueberry (Vaccinium corymbosum L.; Ericales: Ericaceae) is an important crop grown throughout the eastern United States and Canada. Cross-pollination by insects greatly enhances pollination ...

Blueberry Pectin Extraction Methods Influence Physico-Chemical Properties.

Pectins from highbush blueberry powder were sequentially solubilized in water, chelator, and sodium carbonate solvents and precipitated (ADF.WSF, ADF.CSF, and ADF.NSF) or not precipitated in ethanol (...

A placebo controlled treatment trial of sertraline and interpersonal psychotherapy for postpartum depression.

The purpose of the present study was to test the efficacy of sertraline and Interpersonal Psychotherapy (IPT) relative to pill placebo in a two site randomized controlled trial over a period of 12 wee...

Repeat-dose ketamine augmentation for treatment-resistant depression with chronic suicidal ideation: A randomized, double blind, placebo controlled trial.

Several studies indicate that ketamine has rapid antidepressant effects in patients with treatment-resistant depression (TRD). The extent to which repeated doses of ketamine (versus placebo) reduce de...

Limited phenological and dietary overlap between bee communities in spring flowering crops and herbaceous enhancements.

Wild bee populations have undergone declines in recent years across much of the Western world, and these declines have the potential to limit yield in pollination-dependent crops. Highbush blueberry, ...

Medical and Biotech [MESH] Definitions

Several species of the genus Vaccinium which produce the edible blueberry fruit.

Several plant species of the genus VACCINIUM known for the edible blueberry fruit.

Decompression external to the body, most often the slow lessening of external pressure on the whole body (especially in caisson workers, deep sea divers, and persons who ascend to great heights) to prevent DECOMPRESSION SICKNESS. It includes also sudden accidental decompression, but not surgical (local) decompression or decompression applied through body openings.

Depression in POSTPARTUM WOMEN, usually within four weeks after giving birth (PARTURITION). The degree of depression ranges from mild transient depression to neurotic or psychotic depressive disorders. (From DSM-IV, p386)

A device that delivers medication to the lungs in the form of a dry powder.

More From BioPortfolio on "An Investigation Into the Effects of Blueberry Anthocyanin on Cognitive Functioning and Mood Adolescents."

Quick Search


Relevant Topic

Within medicine, nutrition (the study of food and the effect of its components on the body) has many different roles. Appropriate nutrition can help prevent certain diseases, or treat others. In critically ill patients, artificial feeding by tubes need t...

Searches Linking to this Trial