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Hibiscus Tea Associated With Increased Flow-Mediated Dilation

Flow-mediated dilation refers to the widening of an artery when blood flow increases in that artery, and is used to measure blood vessel health. A new study has found that hibiscus tea may help increase flow-mediated dilation.

Twenty-five men with 1-10% cardiovascular disease risk participated in the study. They consumed either 250 ml of hibiscus tea or water with a high fat breakfast. They later consumed a high fat lunch. Blood pressure was measured at baseline and hourly for 4 hours following the meal, and flow-mediated dilation was measured at baseline, hour 2, and hour 4. After a two-week washout period, the participants switched interventions.

The researchers found that consumption of the hibiscus tea resulted in a significant increase in flow-mediated dilation. No significant changes in blood pressure were seen.

The study was conducted by researchers from The University of Reading, UK and Bayero University in Nigeria. It was published online ahead of print on February 5, 2019, in the journal Nutrients.
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