Black tea has been proven to contain some of the same heart-healthy ingredients as purple grape juice and red wine-antioxidants and flavanoids. This study unveiled the role black tea plays in preventing plaque build-up on artery walls and cardiovascular disease.
According to the study, black tea consumption increases the functionality of the vascular endothelium, which forms the inner lining of cells in all blood vessels and responds to the body’s oxygen levels. The endothelium also facilitates blood flow needs by causing blood vessels to expand or contract.
The study examined immediate and long-term effects of black tea vs. water consumption on 50 people with coronary artery disease. Researchers concluded tea improves endothelial-dependent dilation in the arteries while water had no effect.

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