A team of researchers from the University of California, Irvine and the University of Copenhagen has found that two polyphenol compounds found in green and black teas, epicatechin gallate and epigallocatechin-3-gallate, selectively activate KCNQ5, a voltage-gated potassium channel expressed in vascular smooth muscle that regulates vascular tone. An activation of the vascular and neuronal KCNQ5 potassium channel contributes significantly to vasodilation...
