A new study revealed that a cup of green tea daily improves blood flow, which in turn keeps heart healthy and strong.

Green tea, which is already popular throughout the world, contains antioxidants known as ‘flavonoids’ that defend against cell damage and smoothens the blood flow allowing a more efficient circulation

In a randomized experiment on healthy volunteers, Greece researchers saw the dilation of the blood flow in the artery of the upper arm (brachial artery) on three separate occasions-after taking green tea, caffeine and hot water (for a placebo effect). The dimensions were taken at 30, 90 and 120 minutes after consumption.

The study results showed that green tea increased the diameter of the blood vessels with the effect peaking after 30 minutes, and the effect of other two drinks was not significant.  

Dilatation of brachial artery because of increased blood flow is linked to endothelial function and is known to be an independent predictor of cardiovascular risk.  

The study findings are published in the most recent issue of European Journal of Cardiovascular Prevention and Rehabilitation.

The researchers said that the results will support further investigations on heart disease in future.

The study, performed by Dr. Nikolaos Alexopoulos and co-workers at the 1st Cardiology Department, Athens Medical School in Greece, said, “These findings have important clinical implications.”

"Tea consumption has been associated with reduced cardiovascular morbidity and mortality in several studies. Green tea is consumed less in the Western world than black tea, but it could be more beneficial because of the way it seems to improve endothelial function. In this same context, recent studies have also shown potent anticarcinogenic effects of green tea, attributed to its antioxidant properties.”