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Completed

NCT Number: NCT02005939

Effect of Biophenol-rich Pomegranate Extract Intake on Blood Pressure, Hormones, Body Composition and Quality of Life in Healthy Volunteers.

Biophenols can act as powerful antioxidants. Pomegranate (Punica granatum) provides a rich and varied source of biophenols with the most abundant being ellagitannins, tannins, anthocyanins, ellagic and gallic acids. Interest in antioxidant polyphenol-rich pomegranate products has increased in recent years with growing reports of potential health benefits. Pomegranate biophenols have been noted to lower systolic blood pressure, salivary stress hormones and increase insulin sensitivity in previous trials involving participants who have cardiovascular disease, but few studies have been conducted recruiting healthy volunteers, and those have made use of pomegranate juice rather than extract.

The aim of this parallel study is to investigate the effect of pomegranate extract supplementation on blood pressure, lipid profiles, salivary stress hormones, insulin sensitivity, body composition and the perceived quality of life in healthy volunteers over 4 weeks.

It hypothesizes that consumption of biophenol-rich Pomegranate extract could increase insulin sensitivity and perceived quality of life while decreasing blood pressure, body measurements and stress hormones in healthy individuals.

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Key information

Conditions

Cardiovascular Risk Factors Glucose Metabolism Disorders Hyperinsulinism Insulin Resistance Metabolic Diseases Nutritional and Metabolic Diseases

Age range

18 year–65 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Queen Margaret University

Edinburgh, Scotland, EH21 6UU, United Kingdom

About this study

After randomisation to a study arm, eligible participants will consume either one pomegranate extract or placebo capsule (identical in appearance) daily, for a period of 4 weeks. The pomegranate capsule contains 650mg of pomegranate extract (240 mg punicalagins and 350mg total biophenols) and the placebo, maltodextrin.

Participants will be required to attend the university clinic lab twice, having fasted overnight, with all measurements being taken pre and post study at 4 weeks. Blood, saliva and 24 hr urine samples will be provided. Body weight and composition, dietary habits and quality of life will also be measured. The well validated health related Quality of Life Questionnaire (Rand 36) will be administered pre- and post-intervention. This series of questions covers eight spheres of health. The physical health component considers physical functioning, physical role, bodily pain and general health. The mental health aspect examines vitality, social functioning, emotional role and general mental health. Anthropometric measurements recorded will be height, weight, waist, mid upper arm circumference. Bioelectrical impedance analysis (BIA), which measures conductivity from hand to foot, calculating both body fat and fat free mass, will also be performed.

Pre and post study comparison of the amount of polyphenols in 24 hr urine samples provided, alongside capsule consumption checks, will measure compliance. A 3 day diet diary record, will be used for recording energy intake and to highlight any fluctuations in dietary intake over the study period.

The data will be analysed using Statistical Programme for Social Sciences (SPSS) for Windows software version 19. Differences in baseline characteristics will be examined using independent t- tests with extract and placebo groups as independent variables and outcome measures as dependent variables. Paired t-tests will determine any individual differences between pre and post biochemical markers and anthropometric measurements. ANCOVAs will determine the overall differences between the independent groups.

This exploratory study will provide a foundation for and refine the outcome measures required for a larger future trial.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Healthy participants
  • BMI from 18-35
  • Males and Females
  • Age: 18-65 years

Exclusion criteria

Systemic disease, including heart disease and diabetes

  • Allergic reactions
  • Alcohol/drug abuse
  • Immunological conditions
  • Pregnancy or lactation
  • Liver and kidney disease
  • Management for weight control within the last 2 months
  • Heavy smokers

Treatment and study plan

Pomegranate extract

Dietary Supplement

All randomised participants to the intervention arm receive one pomegranate capsule daily for 4 weeks

Other names: Pomegreat PurePlus

Primary outcomes

  1. Blood pressure

    Time frame: Week 0, 4

    Change in systolic and diastolic blood pressure

Secondary outcomes

  1. Changes in insulin sensitivity

    Time frame: Week 0, 4

    Measured through fasting insulin and glucose

Other outcomes

  1. stress hormone levels

    Time frame: Week 0, 4

    Measured via saliva using ELISA methods

  2. Changes in body composition

    Time frame: week 0, 4

    Assessed via BMI, body fat mass

  3. Quality of Life

    Time frame: Week 0, 4

    Assessed by the scored Rand 36 Questionnaire

Sponsors and collaborators

Lead sponsor

Queen Margaret University

Other

Collaborators

  • PomeGreat

Registry information

Official study title

Effect of Pomegranate Extract Intake on Anthropometric, Metabolic and Hormonal Parameters in Human Volunteers: a Double Blinded, Placebo Controlled, Randomised, Exploratory 4 Week Trial.

Acronym: POM-01Expl

Important dates

Study start
2012
Primary completion
2012
Study completion
2012
First posted
Dec 9, 2013
Registry last updated
Dec 9, 2013

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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