The Effect of Hibiscus Sabdariffa L. Tea on Blood Pressure

Completed · Phase 1/Phase 2

Conditions studied: Hypertension

In brief

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.

Key facts

Study ID

NCT00175110

Run by

Tufts University

People needed

66

Expected to finish

2007-12-01

Last updated by the study team

2009-12-03

Who can join

Age: 30 and older, up to 70. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• 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

You may not qualify if…

• 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)

Where it is running

• Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University — Boston, Massachusetts, United States

Full record on ClinicalTrials.gov

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