Overnight tea because of the time is too long, most of the vitamins have been lost, and the tea broth in the proteins, sugars, etc. will become bacteria, mold reproduction of nutrients.?

Even the tannins in the tea may become highly irritating oxides, easily injuring the spleen and stomach, causing gastrointestinal inflammation. So overnight tea is not as safe as new tea.?

But "overnight tea is toxic" claim has no basis. Because the normal bubble cup of tea only put 1 ~ 2 grams of tea, the total amount of nitrates is quite small, a cup of tea with a total of only 6 mg of nitrates, even if all the nitrites, but also not to cause poisoning.

/iknow-pic.cdn.bcebos.com/8694a4c27d1ed21b80902c97a36eddc451da3f62 "target="_blank "title=""class="ikqb_img_alink">/iknow- pic.cdn.bcebos.com/8694a4c27d1ed21b80902c97a36eddc451da3f62?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2CCh_800%2Climit_1% 2Fquality%2Cq_85%2Fformat%2Cf_auto "esrc="/n/2015/0213/c14739-26561074.html "target="_blank "title="People's Daily Online - Tea brewing time is too long breeds disease-causing microorganisms Drinking Tea has 5 taboos"> People's Daily Online - tea brewing time too long breeding disease-causing microorganisms drinking tea has 5 taboos