Previous studies have suggested that black tea's antioxidative, anti-inflammatory and vasodilating effects can help protect against cardiovascular diseases, but researchers from the Charité-Universitätsmediz in Berlin report that adding milk -- even skimmed milk -- may diminish those effects.
The study looked at 16 healthy postmenopausal women with an average age of 59. Each participant's flow-mediated vasodilation from baseline in the forearm brachial artery was measured before and two hours after they were given roughly two cups of freshly brewed black tea without milk, freshly brewed black tea with 10 percent milk, and boiled water as a control.
While drinking the black tea without milk, the subjects' flow-mediated dilation increased more than 400 percent, researchers said in the online issue of European Heart Journal. Women who drank 90 percent black tea and 10 percent skimmed milk had the same insignificant vasodilation increase they would get from drinking two cups of hot water.
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Study finds that adding milk reduces healthy benefits of black tea
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