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CompletedNCT01190319CSCBPUpdated Jul 13, 2017

Study: Effects of Strawberries on Blood Pressure

An interventional study of Strawberry Beverage and Placebo in Pre-hypertension, sponsored by University of California, Davis. Completed at 1 site in United States. Open to participants aged 25 Years to 65 Years. Per ClinicalTrials.gov, last updated 2017-07-13.

Sponsored by University of California, Davis · Not applicable, Interventional, and Basic science

From the registry’s dates

  • Registered 2 years 1 month after the study started (first participant enrolled Sep 2007, registered Oct 2009).
Phase
Not applicable
Study type
Interventional
Enrollment
50
Allocation
Randomized
Ages
25 Years to 65 Years
Sex
All
01

Study summary

The specific aim of the study is to determine whether a freeze dried powder provided by the California Strawberries Commission, can reduce blood pressure in patients with pre-hypertension. The powder is prepared by the California Strawberry Commission (CSC).

Read the detailed description

Primarily, we would like to find out whether freeze dried strawberry powder lowers blood pressure. In addition we would like to know if the strawberry alters the subject's blood cholesterol and the ability of the subject's blood vessels to relax.

02

Conditions studied

  • Pre-hypertension

Keywords

  • blood pressure
  • strawberry
  • fruit phenolics
  • LDL oxidation
  • Flow mediated dilation (FMD)
03

In context

Hypertension

6,689 studies on the registry are indexed under Hypertension; 965 are open to participants now.

This study's enrollment of 50 is below the median of 90 across 4,995 interventional studies indexed under Hypertension.

Browse Hypertension studies →

Lead sponsor

University of California, Davis is the lead sponsor of 798 studies on the registry; 146 are open to participants now.

Of its 65 completed or terminated interventional studies of FDA-regulated products, 43 (66%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
25 Years to 65 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Pre-hypertensive men and women (JNC 7 [The Seventh Report of the Joint National Committee on Prevention, Detection, Evaluation, and Treatment of High Blood Pressure] criteria) between the ages of 25 and 65 years who have no clinical evidence/history of cardiovascular, respiratory, renal, gastrointestinal or hepatic disease.

Exclusion criteria

Exclusion Criteria:

  • Subjects who:

    1. are taking over the counter anti-oxidant supplements,
    2. are taking prescription medications that may interfere with study procedures or endpoints,
    3. have unusual dietary habits (eg., pica),
    4. are actively losing weight or trying to lose weight,
    5. are addicted to drugs or alcohol,
    6. present with significant psychiatric or neurological disturbances,
    7. have known allergies to strawberry, will be excluded from participating in this study.
    8. Patients known to have glaucoma
    9. Pregnant and/or lactating females
05

Study design

Phase
Not applicable
Primary purpose
Basic science
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Participant, Investigator)
Enrollment
50 participants (actual)

Study arms

  • Placebo comparator
    Placebo Beverage

    The placebo beverage is matched in energy, macronutrient composition and sensory properties to the active beverage, but is devoid of strawberry polyphenols.

    Other: Placebo

  • Experimental
    Strawberry Beverage

    The strawberry beverage is matched in energy, macronutrient composition and sensory properties to the placebo beverage, but contains strawberry polyphenols.

    Other: Strawberry Beverage

Interventions

  • OtherStrawberry Beverage

    Beverage, daily for 8 weeks, 12g freeze-dried strawberry powder

    Also known as: Strawberry powder made from a mix of California strawberries.

  • OtherPlacebo

    Placebo beverage, 8 weeks

    Also known as: Beverage

06

What researchers measure

Primary outcomes

  1. Change in blood pressure

    Time frame: 8 weeks

Secondary outcomes

  1. Change in low density lipoprotein (LDL) oxidation

    Time frame: 8 weeks

  2. Change in flow mediated dilation (FMD)

    Time frame: 8 weeks

07

Study locations

1 site
  • University of California Davis (Ragle Hall)
    Davis, California 95616, United States
08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jul 13, 2017, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT01190319
Lead sponsor
University of California, Davis
Collaborators
California Strawberry Commission
Responsible party
Sponsor
First posted
Aug 27, 2010
Start date
Sep 2007
Primary completion
Oct 2011
Completion
Dec 2015
Last update
Jul 13, 2017

Study contacts

Chulani T Kappagoda, MD
principal investigator · University of California, Davis
Britt Burton-Freeman, Ph.D
principal investigator · University of California, Davis

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Jul 2017. You cannot join it, but the record below documents what was studied.

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