A new study from the University of Surrey suggests that enjoying tea and dark chocolate might offer more than just comfort—these foods could also support heart health. Researchers found that flavan-3-ols, natural compounds found in tea, cocoa, apples, and grapes, may help lower blood pressure and improve blood vessel function.
Published in the European Journal of Preventive Cardiology, the study reviewed data from 145 randomized controlled trials. The analysis revealed that consistent consumption of flavan-3-ol-rich foods can reduce blood pressure, particularly in individuals with elevated or high readings. In some cases, the impact was comparable to the effects of certain medications.
Beyond blood pressure, the study found that flavan-3-ols enhance the function of the endothelium—the thin membrane lining blood vessels—an important factor in maintaining cardiovascular health. Notably, these improvements were observed even without changes in blood pressure, indicating broader circulatory benefits.
Professor Christian Heiss, lead author of the study and Professor of Cardiovascular Medicine at the University of Surrey, said:
“The findings are encouraging for those looking for accessible ways to manage their blood pressure and support their heart health through enjoyable dietary changes. Incorporating small amounts of commonly consumed foods like tea, apples, dark chocolate, or cocoa powder into a daily balanced diet could provide beneficial amounts of flavan-3-ols.
“While not a replacement for prescribed medications or medical advice, including more flavan-3-ol-rich foods in a daily routine could be a valuable addition to a healthy lifestyle, especially for those with higher blood pressure. These are findings that, although promising, require ongoing investigation.”
Read the full study in the European Journal of Preventive Cardiology.