1, tea is made through many processes, and there will inevitably be some dust in the making process, which will foam when brewing, so we usually wash tea instead of drinking it at the first time.

2. After some tea leaves are processed, there will be some white hairs on the leaves, which is also a cause of foaming.

Tea itself contains a substance called "tea saponin", as the name implies, it is soap.

Green tea, one of the main tea leaves in China, refers to a beverage made from new leaves or buds of tea trees without fermentation, after deactivation, shaping and drying. The color of the finished product and the brewed tea soup retain the green style of new tea. Drinking green tea regularly can prevent cancer, reduce fat and lose weight, and also reduce the harm of nicotine to smokers.