The object is to provide beverages that allow for sustained intake and which have an effect of improving the vascular endothelial function as by promoting the secretion of NO from vascular endothelial cells so as to potentiate the NO action.The object is attained by providing proanthocyanidins containing tea beverages that contain procyanidin B1 (PB1) and procyanidin B3 (PB3) in a total amount not smaller than a certain concentration and which are free from any peculiar flavor to become easier to drink; they allow for sustained intake and have an effect of improving the vascular endothelial function.