It is best not to drink, not more than 24 hours can be.

The tea brewed at night before going to bed, get up and drink it the next day, the tea has not deteriorated, drink of course no problem. If the tea leaves are steeped for too long, especially if they are left for too long at higher temperatures, they will lose their green color and increase their yellow color. This is the oxidation of tea polyphenols in the tea to form yellow-red, red-brown oxidation products, mainly theaflavin, theaflavin, theaflavin, theaflavin, etc..

These products are non-toxic and will not harm the human body. This change is regardless of day and night, the daytime temperature is higher, the change is still a little bigger. But if the tea leaves are steeped for too long, it will breed bacteria, deterioration occurs, of course, can not drink, generally no more than 24 hours to drink are not related.

Expanded:

Drinking tea precautions:

1, avoid drinking strong tea

Strong tea contains a large number of stimulating caffeine, theophylline, and so on, drinking too much can lead to insomnia, headache, tinnitus, heart discomfort and injury to the stomach and intestines.

2, avoid drinking hot tea

Too hot tea on the human mouth, throat, esophagus and stomach stimulation is strong, and the entrance of the drink if more than 62 ℃ water, it is easy to damage the stomach lining, and lead to gastric disorders, and may even lead to the occurrence of cancer of the floor of the mouth. Therefore, it is better to wait for the temperature of the tea to cool down a little before drinking it.

3, avoid drinking tea on an empty stomach

Drinking tea on an empty stomach will affect the lungs, stimulate the spleen and stomach, and then make people lose appetite, indigestion.

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