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How Drinking Green and Black Tea can Lower Blood Pressure

Lauren Gamble

Posted on March 15 2021

Healthcare researchers have discovered a mechanism within the body that may explain how tea can lower the blood pressure. This is important information for the nearly half of Americans and nearly 1 billion people worldwide suffering from hypertension. The researchers discovered that compounds called catechins, which are found in both black and green teas, are able to relax the smooth muscles lining the blood vessels. When this smooth muscles relaxed, it can lead to a lowering in the blood pressure.

Drinking tea has a longstanding history of use, as ancient Chinese gan drinking caffeinated tea more than 4,000 years ago. Green and black teas are made from a bush called Camellia sinensis. Black tea is made from fermented leaves, while green tea is made from unfermented leaves which provide more antioxidants to the body. 

Scientists have known for a while that green tea reduces growth of cancers, lowers blood pressure and can reduce the risk of heart disease. Yet, the mechanism at the molecular level was still unknown- i.e. scientists knew that tea could lower blood pressure, yet they didn’t know how it happened in the body. But scientists at UC Irvine and University of Copenhagen in Denmark have validated that the antioxidants in tea open up the ion channels which can thereby relax the muscles that line the blood vessels and allow potassium ions with a positive charge to exit the cells. 

These findings are important for the future of antihypertensive drugs and medications, which can utilize this new information to create better products and medicines and prevent progressions of hypertension to chronic kidney disease, heart attack or heart failure. Drinking tea each day is beneficial for the heart and vessels, and could possible extend your life. So sip slowly and reap the benefits of this natural medicine.

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