After staying overnight for a long time, most of the vitamins are lost, and the protein and sugar in the tea soup will become nutrients for bacteria and mold. So people usually think that overnight tea can't be drunk. In fact, the non-deteriorating overnight tea can not only be drunk, but also has the following health care functions:

Anti-cancer and anti-oxidation: Tea leaves will turn reddish brown after a long time, which is due to the oxidation of tea polyphenols into reddish brown tea pigments. Studies have shown that tea polyphenols and tea pigments have strong anti-cancer and anti-oxidation effects. Although the content of vitamin C in overnight tea is greatly reduced, it still has disease resistance.

Hemostasis: Overnight tea is rich in acid, which can prevent capillary bleeding. If you suffer from stomatitis, carbuncle with red tongue, eczema, gingival bleeding, etc. You can rinse your mouth with overnight tea. It can also be used for bathing sores, abscesses and skin bleeding.

Mingmu: Tea polyphenols in overnight tea have antibacterial and anti-inflammatory effects. If red silk appears in your eyes, you can wash it with overnight tea several times a day.

Stop itching: Wash your hair or wipe your body with warm overnight tea. Fluorine in tea can quickly relieve itching and prevent eczema.

Hair growth: Washing your hair with overnight tea also has the effect of hair growth and dandruff removal. If the eyebrows are too thin, you can brush them with a brush every night. Over time, your eyebrows naturally become thick and bright.

Fixing teeth and cleaning teeth: after fluoride in tea calcifies with enamel of teeth, it will enhance the resistance to acidic substances and reduce the occurrence of tooth decay; Fluorine can also eliminate dental plaque, and it is best to rinse your mouth with tea two or three minutes after meals.

In addition to bad breath: tea contains essential oil and smells delicious. Before and after brushing your teeth in the morning or after meals, gargle a few mouthfuls of overnight tea, which can make your breath fresh, and often gargle with tea can eliminate bad breath.

The use of overnight tea should be based on continuous deterioration (deterioration). In summer, when the temperature is high, tea leaves are prone to rancidity and taste bad. If you leave it for more than 24 hours, you'd better not drink it, otherwise it will cause diarrhea.