Black tea will be oxidized when it is soaked for a long time, and the brown color will turn to black, which will greatly reduce the taste and produce nitrosamines, which is not good for the health. Even if tea is made with tea leaves, it will be poured out every time, and the tea leaves need not be soaked, and water will be added when drinking again, so that the tea is delicious.

Lipton black tea is a teabag made by chopping the original piece of black tea. Chopped black tea is released very quickly in water, and all the essence in tea leaves is released in 2-3 minutes. There is no point in keeping the tea bag inside all the time.

If you don't take the tea bag out of the cup, other elements in the tea will be released, which will make the tea bitter and affect the taste.

Black tea is sweet and warm, which can nourish human yang; Black tea is rich in protein and sugar, which can warm the abdomen by heating, enhance the cold resistance of human body, and help digestion and greasy. Black tea is also called fully fermented tea because it is fully fermented during processing and oxidizes tea tannins. Fresh tea leaves are oxidized to form red oxidative polymerization products-theaflavins, thearubigins and theabrownins. Some of these pigments are dissolved in water and brewed into black tea soup.