Most of the beneficial properties of tea are due to the presence of high amounts of polyphenolic compounds in tea. When a cup of tea is consumed these polyphenols have to be absorbed from the digestive tract into the blood stream to impart the beneficial effects. Research carried out to find the absorption of polyphenols in tea with and without milk indicate that addition of milk does not alter the absorption of polyphenols. Therefore, addition of milk does not reduce the health benefits of tea.
