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Effect of Red Raspberry Consumption on Fasting Oxidative Stress Biomarkers

U

University of Toronto

Status and phase

Completed
Phase 1

Conditions

Oxidative Stress

Treatments

Dietary Supplement: individually quick frozen red raspberries

Study type

Interventional

Funder types

Other

Identifiers

Details and patient eligibility

About

The purpose of this study is determine whether daily consumption of frozen red raspberries can improve the antioxidant capacity of the blood and reduce the effects of oxidative stress, dose-dependently, in a healthy adult population.

Full description

Red raspberries are an excellent source of numerous polyphenolic antioxidants. The bioactivity of these compounds have been implicated in many biological pathways and may function to reduce the risk of numerous chronic diseases. We are conducting an intervention study with frozen red raspberries on a healthy adult population in order to determine if raspberry polyphenols are bioavailable and bioactive in vivo. Twenty-four subjects (12 male and 12 female) will be recruited to participate and consume one-cup frozen red raspberries daily for two weeks, they then will randomly be assigned to consume either one, two or four cups of raspberries for another two weeks, this will be followed by four weeks of non-treatment. Blood samples and 12-hour urine collections will be taken in order to measure the concentration of raspberry polyphenols in response to treatment dose. Dose-dependent treatment effects on blood biomarkers for antioxidant capacity, oxidative stress, inflammation and other chronic disease risk factors will also be measured.

Enrollment

24 patients

Sex

All

Ages

18 to 43 years old

Volunteers

Accepts Healthy Volunteers

Inclusion criteria

  • healthy adults

Exclusion criteria

  • obese (>30kg/m2)
  • high blood pressure (140/90mmHg)
  • allergic to raspberries
  • pregnant or lactating
  • history of chronic disease
  • currently taking medication

Trial design

Primary purpose

Prevention

Allocation

Randomized

Interventional model

Parallel Assignment

Masking

None (Open label)

24 participants in 3 patient groups

one-cup
Experimental group
Treatment:
Dietary Supplement: individually quick frozen red raspberries
Dietary Supplement: individually quick frozen red raspberries
Dietary Supplement: individually quick frozen red raspberries
two-cups
Experimental group
Treatment:
Dietary Supplement: individually quick frozen red raspberries
Dietary Supplement: individually quick frozen red raspberries
Dietary Supplement: individually quick frozen red raspberries
four-cups
Experimental group
Treatment:
Dietary Supplement: individually quick frozen red raspberries
Dietary Supplement: individually quick frozen red raspberries
Dietary Supplement: individually quick frozen red raspberries

Trial contacts and locations

1

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Data sourced from clinicaltrials.gov

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