Many people feel that overnight tea can not drink, there are many claims, one of the more “alarmist” claim is that drinking overnight tea will get cancer, in fact, this claim is not based on science. The reason why overnight tea should not be used is because it has been too long, most of the vitamins have been lost. However, the overnight tea has not deteriorated, in the medical own wonderful use. A, anti-cancer antioxidant tea placed for a long time will become reddish-brown, which is due to the oxidation of tea polyphenols into a reddish-brown tea pigment. Research shows that tea polyphenols and tea pigments have a strong anti-cancer, antioxidant effect. Second, stop bleeding Overnight tea is rich in acid, can stop capillary bleeding. If suffering from stomatitis, tongue canker, eczema, gum bleeding, etc., can be treated with overnight tea gargle. Sores and ulcers, skin bleeding can also be used for bathing. Third, bright eyes The tea polyphenols in overnight tea has an antibacterial and anti-inflammatory effect, if the eyes appear red silk, can be washed with overnight tea several times a day. Four, stop itching with warm overnight tea to wash your head or body, tea in the fluorine can quickly stop itching, can also prevent eczema. Fifth, hair washing with overnight tea, and hair growth and eliminate dandruff effect. If you think the eyebrows are sparse, every day you can use a brush dipped in overnight tea brush eyebrows, days, eyebrows naturally become dense and shiny. Six, solid teeth teeth cleaning tea fluorine and tooth enamel calcification later, will enhance the resistance to acid, reduce the occurrence of tooth decay; fluorine can also destroy plaque, the best two or three minutes after meals with tea rinse mouth. Seven, in addition to halitosis tea contains essential oil components, aromatic smell, before and after brushing teeth in the morning or after meals, containing a few mouthfuls of overnight tea, can make breath fresh, often gargle with tea can eliminate halitosis. Eight, sunscreen skin sunburn, can be dipped in a towel overnight tea gently wipe. Because tannic acid has an astringent effect on the skin, the flavonoid compounds in tea also has an anti-radiation effect. Nine, to fishy to greasy overnight tea also has a particularly strong in addition to fishy and greasy effect, used to wash hands after eating shrimp and crab feel fresh. Ten, laxative After waking up in the morning, a cup of overnight herbal tea brewed last night, there is a laxative, brain, fat loss effect. Eleven, cure foot The rich substances contained in the overnight tea, has the effect of cure foot. Note: the use of overnight tea, should not be rancid (spoiled) as degree. High summer temperatures, tea is prone to sour and tasteless, if set aside for more than 24 hours, it is best not to drink, otherwise, it will cause diarrhea.