This randomized dietary intervention trial examined the effects of a high fruit diet on systemic BP in African-Americans. Thirty-eight free-living subjects with systolic BPs between 130-159 mm Hg and diastolic BPs between 85-99 mm Hg, were enrolled for a six week period. The cases were given daily supplements of potassium rich foods: bananas, orange juice and raisins, while no dietary advice or food was given to the controls.
After six weeks, the means systolic BP was 5.79 mm Hg ( p=.009) lower in the cases than the controls. The mean diastolic BP at week six was 3.76 mm Hg (p=.047) lower in the cases than the controls. Analysis of the study participants who had mild hypertension, revealed a mean reduction in systolic and diastolic blood pressure after six weeks of 12.6 mm Hg (p=.131) and 6.53 mm Hg (p=.014) respectively in the cases when compared to the controls. The systolic BP drop for the cases was significant at 14.42 mm Hg (p=.02) after three weeks. High levels of fruit intake (6 to 8 servings/day) was correlated with a significant (P<.05) mean drop in blood pressure (6 to 8.19 mm Hg) in the cases when compared to the controls who consumed one or fewer servings of fruit per day.
The results of this study suggest that a diet high in potassium rich fruits such as bananas, orange juice and raisins is an effective approach to lowering BP in individuals with mild hypertension.
School of Public Health
Doctor of Public Health (DrPH)
Year Degree Awarded
Date (Title Page)
Library of Congress/MESH Subject Headings
Blood Pressure -- African Americans -- United States; Vegetables; Nutrition; Hypertension -- diet therapy; Fruit.
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Gibbons, Leonard L., "Effects of High Fruit Intake on Systematic Blood Pressure in African Americans" (2000). Loma Linda University Electronic Theses, Dissertations & Projects. 1032.
Loma Linda University Electronic Theses and Dissertations
Loma Linda University. Del E. Webb Memorial Library. University Archives