Friday, January 11, 2013

Black tea and blood pressure

A cup of tea has long been a favorite way to relax for the English.  

But scientists have discovered that tea actually helps lower blood pressure and prevent heart disease. Drinking at least three cups of black tea each day can actually reduce blood pressure, according to research from the University of Western Australia.

Volunteers with normal to high blood pressure were given three drinks a day containing 429 milligrams of polyphenols from plants. After six months, their blood pressure dropped between two and three mmHg, the extent to which pressure is used in medicine.

Blood pressure of 120/80 mmHg to 140/90 mmHg is considered normal, while one that exceeds 140/90 is considered high. If the experiment is applied to the population at large, the number of people with high blood pressure could be reduced by 10% and the risk of heart disease could fall between 7 and 10%.

"Our study shows for the first time that long-term and regular consumption of black tea can result in significantly lower blood pressure in people with normal to high blood pressure," wrote the team led by Dr. Jonathan Hodgson, in the journal Archives of Internal Medicine. Previous studies have suggested that adding milk tea does not affect the body's ability to absorb polyphenols.

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