Make a cup of tea
Vacuum cup are mostly adopt sealed type for heat preservation, due to the structure of the tea itself, can be fermented in airtight case, after fermentation of the tea will produce some harmful substances to human body. Tea is rich in protein, fat, sugar, vitamins and minerals and other nutrients, is a kind of natural health drink, containing tea polyphenols, caffeine, tannins, tea pigment and so on, and has many pharmacological effects.
Tea leaves long soak in high temperature water, like warm and Fried boiled, tea polyphenols, tannins and other substances will be soaked in large quantities, make the tea water color heavy, have bitterness taste.
Vitamin C and other nutrients in the water temperature exceeds 80 ℃ will be destroyed, high temperature and soaked for a long time will make its loss too much, which reduces the tea health care function.
At the same time, due to always maintain a high water temperature, the aromatic oil in tea can quickly a large number of volatile, tannic acid, theophylline, a large number of seepage, this not only reduces the nutritional value of tea, reduced the tea, also makes harmful substances. If you drink this tea for a long time, it will be harmful to your health, leading to a variety of digestive, cardiovascular, neurological and hematopoietic diseases.