Why is the thermos cup not suitable for making tea? Nutrition tells you.
Tea contains a lot of tannic acid, theophylline, tea sesame oil and many vitamins. It is more suitable to brew with boiling water at about 80 degrees Celsius. If you use a vacuum flask to soak the tea in high temperature water for a long time, it will be like decoction with a low fire. , Will destroy all the vitamins in the tea, the tea sesame oil will also volatilize in large quantities; tannic acid and theophylline will be leached in large quantities. This not only reduces the nutritional value of tea, but also loses the fragrance of tea and increases harmful substances.
In winter, the temperature is relatively low, and a sip of warm tea is indeed a pleasant thing. Tea is very nutritious and is a favorite drink, especially in winter, more people like to drink tea. Tea has a relatively high temperature requirement. Making tea with a thermos cup will reduce the nutrition of the tea. At the same time, the elderly should drink less tea in winter.
However, readers may not know that in winter, the temperature is low. In order to ensure the temperature of the tea, many people are willing to use a vacuum flask to make tea, so that they can drink until the hot tea.
In response, Dr. Lin from the Gastroenterology Department of Jilin Provincial People’s Hospital explained: “Tea has a high nutrient content, containing a lot of theophylline, chlorophyll, vitamins and a small amount of various amino acids, as well as potassium, magnesium, calcium, and phosphorus. Trace elements, if you use a vacuum insulated cup to make tea, the multivitamins and aromatic substances in the tea will be reduced a lot under high temperature and constant temperature, so that the brewed tea will feel a bit bitter and taste far behind without vacuum The tea brewed in the thermos has a solid taste."
At the same time, in response to the situation that the elderly prefer to drink tea, Dr. Lin reminded that because the elderly are older, the ability to regulate or maintain body temperature in a cold environment has a lot to do with the amount of iron intake in the diet. Theophylline is an alkali Sexual substances will consume the iron element in the human body, which will reduce the cold resistance of the elderly, especially the elderly who are afraid of cold, and must drink less tea in winter. Even if you drink tea, you should drink tea half an hour after a meal, and do not drink tea while eating.