effects of black tea on blood pressure
Meanwhile, the green tea group also saw an improvement in performance, covering a longer cycling distance by week four. Black tea and blood pressure Drinking two cups of black tea a day has been associated with improvements in arterial stiffness and decreases in systolic and diastolic blood pressure, according to the journal Nutrients. The study from Unilever R&D took 19 people with elevated blood pressure.
Black tea contains 2% to 4% caffeine, which affects thinking and alertness, increases urine output, and may reduce the symptoms of Parkinson's disease. It also contains antioxidants and other substances that might help protect the heart and blood vessels.