Polyphenol levels are the same in the different types of tea you drink (white, green, and black). What affects the amount of polyphenol in tea are the varietal of the tea bush, the age of the leaf when it is picked, the size of the tea leaves brewed, the amount of tea brewed, and the length of brew. Therefore, the same amount of white, green, and black tea made from the same tea bush, on the same day will have virtually the same polyphenol levels.