General tea has a shelf life, for the expiration of the tea should try to avoid drinking, especially expired and improperly preserved, moldy tea, in order to avoid adverse effects on the body. General tea has a shelf life, usually based on the shelf life of tea packaging to determine whether the expiration date. Expired tea is prone to mold, producing many harmful substances, after drinking may cause gastrointestinal symptoms, such as abdominal pain, diarrhea, etc., so you should try to avoid drinking expired tea. Daily purchase of tea should pay attention to the production, shelf life, should also try to save in a closed, dry, light, cool environment, not only is the expiration date of the tea should not be consumed, for the preservation of improper, obviously deterioration of the tea, even in the shelf life should not be consumed.