Drinking overnight tea may produce diarrhea, mainly due to the overnight tea placed in the environment is more humid, and the tea is exposed to the air is easy to breed bacteria or fungi, but also in the night there may be frequent insect activity, accidentally dropped into the tea, drinking may lead to vomiting diarrhea and other conditions.
The overnight tea due to storage time is longer, the tea parts of the precipitation caused by the full dissolution of pigments in the tea, long-term drinking may lead to yellow teeth, mainly due to pigmentation and teeth. It is recommended that patients brush their teeth in a timely manner to avoid damage to the teeth.
Occasionally drink overnight tea will not produce significant harm, but if long-term consumption will cause adverse effects on the body