Tea Can Help Lower Your Blood Pressure

Researchers at the University of California, Irvine, led by George Abbott PhD and Kaitlyn Redford, published their findings in Cellular Physiology and Biochemistry explaining why and how tea lowers your blood pressure. They found that two flavonoid type compounds found in green and black tea activate a specific type of ion channel protein named KCNQ5 which allows potassium ions to diffuse out of cells to reduce cellular excitability. The two catechin type flavonoids acting on KCNQ5 in the smooth muscle of blood vessels relax these blood vessels.

Scientists have previously found that tea can reduce blood pressure by a small amount. Their discovery of the role of the KCNQ5 protein now gives pharmaceutical developers a target for future medications. Hypertension is present in one third of adults in the world.

Tea has been consumed for over 4,000 years and two billion cups a day are consumed worldwide. Next to water it is the most common liquid consumed on the planet. It all comes from the leaves of the evergreen species Camellia sinensis with a difference in the fermentation process producing either green, oolong or black teas.

In much of the world, tea is consumed with milk mixed in. Dr Abbott’s group found that in the laboratory when milk was added to the teas it negated the effects of the KCNQ5 protein. They additionally found different temperatures of the tea resulted in different effectiveness of the KCNQ5 protein. Professor Abbott noted however that in humans’ digestive tracts our stomach and intestines separate out the milk products from the active KCNQ5 protein allowing it to work. He also noted that with our body temperature being about 37 degrees centigrade, the positive effects of the tea continued to work independent of whether you consumed hot tea or iced tea.

The message from this research is that a cup or two of tea per day will help lower your blood pressure.

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