A study recently released in the Archives of Internal Medicine shared that drinking three cups of black tea a day may help lower blood pressure.
The research effort tested black tea against a placebo, in order to determine the effect of drinking the beverage over time on lowering the blood pressure of the study participants.
The study analyzed data from 95 study participants, who consisted of male and female subjects aged 35 to 75. The participants had systolic blood pressure readings that range from 115 to 150, and were randomly assigned to one of two groups.
One of the groups was asked to drink three cups of regular leaf tea containing 1,493 mg of powdered black tea solids, with 429 mg of polyphenols and 96 mg of caffeine. The participants in the second group were asked to drink a placebo, which had the same flavor and caffeine content, but did not contain tea solids.
The results of the study indicated that the group who drank tea with black tea solids experienced a drop of systolic and diastolic blood pressure over a period of six months. When compared against the placebo group, it was observed that the systolic and diastolic blood pressure of those who drank black tea dropped by two to three points.
According to the study authors, this drop translated to a 10 percent drop in the prevalence of high blood pressure, as well as a 7% to 10% decrease in the risk of cardiovascular disease.