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J Nutr Sci. 2017 Aug 9;6:e39. doi: 10.1017/jns.2017.36. eCollection 2017.

Effect of pomegranate extract on blood pressure and anthropometry in adults: a double-blind placebo-controlled randomised clinical trial.

Author information

1
Department of Dietetics, Nutrition and Biological Sciences, Queen Margaret University, Musselburgh, East Lothian EH21 6UU, UK.
2
Environmental and Biochemical Sciences Group, The James Hutton Institute, Dundee DD2 5DA, UK.
3
Faculty of Pharmacy, Middle East University, Amman, Jordan.

Abstract

Pomegranate (Punica granatum), a polyphenol-rich fruit, has been suggested to reduce cardiovascular risk due to its antioxidant properties. Hypertension and obesity are the most preventable cardiovascular risk factors. Few studies on blood pressure and/or body-weight status have been conducted in human subjects. Previous investigations have tended to focus on pomegranate juice. The aim of the present study was to investigate the effect of pomegranate extract (PE) on blood pressure and anthropometric measures in adults with no symptomatic disease. A total of fifty-five participants enrolled in a randomised double-blinded placebo-controlled clinical trial where they were assigned to either PE capsules or placebo capsules for 8 weeks. Blood pressure, body weight, waist circumference, waist:hip ratio (WHR) and body composition (lean body mass, body fat) were measured at baseline, week 4 and week 8. Results showed a significant decrease in diastolic blood pressure after 8 weeks (by 2·79 (sd 5·32) mmHg; P < 0·05), while the decrease in systolic blood pressure did not reach statistical significance (2·57 (sd 7·4) mmHg; P > 0·05). Body fat percentage, lean body mass, waist circumference and WHR did not significantly differ between groups at the end of the intervention. Results suggest that PE may reduce blood pressure and possibly prevent hypertension in the normotensive population. Further large trials are required to elucidate this effect.

KEYWORDS:

Anthropometry; Blood pressure; Cardiovascular risk; DBP, diastolic blood pressure; Obesity; PE, pomegranate extract; Polyphenols; Pomegranate extract; QMU, Queen Margaret University; SBP, systolic blood pressure

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