Effects of cocoa-rich chocolate on blood pressure, cardiovascular risk factors, and arterial stiffness in postmenopausal women: A randomized clinical trial

Abstract

This study aimed to evaluate the effects of the intake of 10 g of cocoa-rich chocolate on blood pressure, other cardiovascular risk factors, and vascular structure and function in postmenopausal women. A total of 140 postmenopausal women participated in this randomized and controlled parallel clinical trial. For six months, the intervention group (IG; n = 73) consumed daily 10 g of chocolate (99% cocoa) added to their usual food intake, whereas the control group (CG; n = 67) did not receive any intervention. Blood pressure, pulse pressure (PP), cardio-ankle vascular index (CAVI), ankle-brachial index (ABI), brachial-ankle pulse wave velocity (baPWV), augmentation index, and laboratory variables were measured at baseline and six months. ANCOVA analyses adjusted for baseline values revealed no significant differences for systolic blood pressure (-1.45 mm Hg; 95% confidence interval (CI): -4.79, 1.88; p = 0.391) or baPWV (0.18 m/s; 95% CI: -0.14, 0.50; p = 0.263) between groups. A decrease in PP was observed in the IG compared to the CG (-2.05 mm Hg; 95% CI: -4.08, -0.02; p = 0.048). The rest of the vascular structure and function parameters and other measured variables remained unchanged. The daily intake of 10 g of cocoa-rich chocolate seems to provide little improvement to cardiovascular health, but neither does it cause any adverse effects on the parameters evaluated in postmenopausal women in the long term.