First brew of tea In the process of planting, processing and packaging, modern tea leaves will inevitably be contaminated by pesticides, fertilizers, dust and other substances. The first brew of tea is for washing the tea leaves. It should be poured out as soon as possible and then flushed into boiling water again. Metamorphic tea The moldy and deteriorating tea contains various mycotoxins such as penicillin. These toxins enter the body and can cause symptoms such as diarrhea, abdominal pain, dizziness, and weakness of the limbs. Tea for hangover Tea has the function of exciting nerve center. Drinking strong flavor of tea after drunkenness will increase the burden on the heart. Patients with heart disease have more serious consequences. Drinking tea will also accelerate the diuretic effect, so that the toxic aldehyde in the alcohol has not been decomposed and is discharged from the kidney. People who drink tea after drinking are easier to have kidney diseases. Long soaking tea and overnight tea When the brewing time is too long, not only turns tea color into dark, but also the taste turns poor and the fragrance is less. It is because the vitamins and amino acids in the tea are reduced by oxidation and therefore the nutritional value of the tea is greatly reduced. Also, since the tea is soaked for too long, the number of microorganisms and bacteria in the tea soup are greatly produced and it is unsanitary. It may easily cause irritation to the stomach and cause inflammation. Tea leaves placing with other flavored things If the tea leaves and other flavored things are put together for a while, the taste will be changed. Some tastes are toxins, such as paint, camphor taste. Strong tea Long-term drinking strong tea can cause iron deficiency anemia. In addition, strong tea contains a lot of caffeine, theophylline, etc. It is very irritating. Drinking strong tea can cause insomnia, headache, tinnitus, and gastrointestinal, and some people will have vomiting after drinking. Source: Premium Chinese Tea