A study done in Germany discovered that black tea had a significant effect of artery dilation, which is the ability of arteries to dilate or expand and is very important in the maintenance of normal blood pressure levels. This molecular substance found in black tea is known as catechins and their purpose is to expand arteries by producing nitric oxide.
The study also revealed that milk which most add to their tea actually blocked the ability of catechins to dilate blood vessels. You might want to think twice about adding that ‘spot of milk’ to your next hot cup of tea. In another study is was found that by drinking a half cup of tea per day could reduce a persons risk of high blood pressure by almost 50%, and people who drank at least two and a half cups per day reduced their risk even more. Their risk was reduced even when they had risk factors for high blood pressure, such as high sodium intake.
Since black tea comes from the same Camellia sinensis plant, as does all tea, we can come to expect it to have the similar benefits of green and white teas. Black tea can prevent heart attack and stroke by saving the arteries. In a test done by Dr. Joseph Vita, of the Boston University School of Medicine, he gave heart patient’s plain water and others black tea.
After only one month the patients who drank the tea showed that impaired blood vessel functions had improved by 50%. Also another study in the Journal Circulation showed that by drinking more than 2 cups per day decreased the risk of death following a heart attack by 44%. Tea is a powerful source of flavonoids quercetin, kaempferol and myricetin and test have shown that high dietary intakes of these compounds are associated with a reduced risk of fatal heart attacks and those who drank a cup and a half per day were almost 40 percent less likely to suffer a heart attack when compared with tea abstainers.
So now you have even more reasons to have that ice tea or hot tea, a toast to your health.