Because tea contains a large amount of tannic acid, it can be combined with saponins and alkaloids contained in tonics to produce sediments that the human body cannot absorb, thus reducing the nourishing effect of tonics. Ginseng, Radix Astragali, Radix Polygoni Multiflori and Radix Rehmanniae Preparata, which are commonly used as tonics, all contain more active substances such as alkaloids, so it is not advisable to drink tea at the same time when taking tonics, let alone take tonics instead of water.
Therefore, health care products and tea are still separated. You can eat health care products for an hour and then drink tea.