The Effect of Hibiscus Sabdariffa L. Tea on Blood Pressure

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.

Completed

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Key information

Conditions

Hypertension Cardiovascular Diseases Prehypertension Vascular Diseases

Age range

30 year–70 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 1 / Phase 2

Primary location

Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University

Boston, Massachusetts, 02111, United States

Who can participate

Healthy volunteers accepted: Yes

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

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)

Treatment and study plan

herbal therapy/botanical therapy (Hibiscus sabdariffa)

Behavioral

Sponsors and collaborators

Lead sponsor

Tufts University

Other

Collaborators

Celestial Seasonings
Tufts Medical Center

Registry information

Official study title

The Effect of Hibiscus Sabdariffa L. Tisane on Blood Pressure in Prehypertensive and Mildly Hypertensive Men and Women

Important dates

Primary completion: 2007
Study completion: 2007
First posted: Sep 15, 2005
Registry last updated: Dec 3, 2009

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.

Published trials that share one or more normalized conditions with this study.

Completed