What substances will be produced by overnight tea? Tea left for a long time will breed some bacteria and molds, these microorganisms will grow and multiply in the tea, and will produce some harmful substances, such as theophylline and tannic acid. These substances are harmful to the human body, especially for the gastrointestinal tract, which is easy to cause diarrhea, abdominal pain and other symptoms.
So, what are the effects of overnight tea on the body? Due to the large number of bacteria and molds that breed in overnight tea, if you drink overnight tea for a long time, it may cause certain effects on your health, such as causing gastrointestinal diseases and malnutrition. In addition, some harmful substances in overnight tea may also cause certain harm to the human body, such as carcinogens, heavy metals, etc.
So I don't think overnight tea can be drunk. If you make a cup of tea in the morning and drink half or more, the remaining half or leftover tea can be stored in the refrigerator, but it is not recommended to drink it again. Of course, if you are very fond of tea, you can choose fresh tea leaves to rebrew.
Finally, I would like to remind everyone that drinking tea is a healthy habit, but we must pay attention to the hygiene and safety of tea. Don't drink tea that has been left out for too long, and try to choose fresh tea leaves, so that you can really enjoy the health benefits of tea.