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The Effect of Hibiscus Sabdariffa L. Tea on Blood Pressure

This study has been completed.
Celestial Seasonings
Tufts Medical Center
Information provided by:
Tufts University Identifier:
First received: September 12, 2005
Last updated: December 2, 2009
Last verified: December 2009
The goal of this study is to find out whether the plant compounds present in Hibiscus sabdariffa, a plant commonly used in herbal tea blends and other beverages, will have a beneficial effect on blood pressure in people with mildly elevated blood pressure.

Condition Intervention Phase
Hypertension Behavioral: herbal therapy/botanical therapy (Hibiscus sabdariffa) Phase 1 Phase 2

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double (Participant, Investigator)
Primary Purpose: Treatment
Official Title: The Effect of Hibiscus Sabdariffa L. Tisane on Blood Pressure in Prehypertensive and Mildly Hypertensive Men and Women

Further study details as provided by Tufts University:

Enrollment: 66
Study Completion Date: December 2007
Primary Completion Date: December 2007 (Final data collection date for primary outcome measure)

Ages Eligible for Study:   30 Years to 70 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Systolic blood pressure 120-150 mm Hg
  • Diastolic blood pressure 95 mm Hg or less
  • Body mass index (BMI) 18.5-34.9 kg/m2

Exclusion Criteria:

  • Smoking
  • Use of medications that influence blood pressure
  • Cardiovascular disease
  • Chronic kidney disease
  • Diabetes
  • Regular use of vitamin C supplements (min 500 mg/day) within prior 30 days
  • Regular strenuous aerobic activity greater than 30 min/day
  • Excessive intake of caffeine or alcohol
  • Pregnancy within last 6 months or during study period
  • Abnormal complete blood count (CBC), urinalysis or electrocardiogram (EKG)
  Contacts and Locations
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Please refer to this study by its identifier: NCT00175110

United States, Massachusetts
Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University
Boston, Massachusetts, United States, 02111
Sponsors and Collaborators
Tufts University
Celestial Seasonings
Tufts Medical Center
Principal Investigator: Jeffrey B Blumberg, Ph.D. Tufts Medical Center
  More Information

Additional Information:
Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Jeffrey B. Blumberg, Tufts University Identifier: NCT00175110     History of Changes
Other Study ID Numbers: PV3727
Study First Received: September 12, 2005
Last Updated: December 2, 2009

Keywords provided by Tufts University:
mild hypertension

Additional relevant MeSH terms:
Vascular Diseases
Cardiovascular Diseases processed this record on September 19, 2017