Wu Chen-tuo, retired director of the Taiwan Tea Experimental Station, who is known as "Dr. Tea," says that milk neutralizes the tannins in tea and so can remove bitterness and astringency.
出身台灣茶葉改良場，有茶博士之譽的退休老場長吳振鐸表示，牛奶可中和茶裡的單寧酸，因此能去苦澀。