Is the tea scale deposited in the teapot harmful?

The tea dirt in the teapot is also called tea mountain by senior tea drinkers. At present, there are two opinions: one is to remove it in time, saying that it contains heavy metals and is harmful to human body. Another way of saying it is that tea dirt is harmless. Over time, the pot with tea mountain only needs to be filled with boiling water, and the long tea fragrance can be revealed without adding tea leaves.

My personal opinion is that if you use this pot often, you don't need to wash it. If you don't use it much and often put it on hold, then wash it and put it there.

As for many people who say that heavy metals such as mercury, cadmium and lead in tea scale are harmful to people, I am still skeptical. Everyone knows that matter can only be transformed, and it will not be produced out of thin air. So where did all the mercury come from? Don't talk about tea, tea is drunk, and the trace deposition in tea is not harmful at all. If it is really said that the deposition of tea leaves will be harmful to the health, then drinking tea often will lead to heavy metal poisoning. If it's in a teapot, there's a tissue that can detect it. Unless it is a chemical pot, there is a possibility that the heavy metal precipitation will exceed the standard, and the chemical pot has nothing to do with tea scale. . . So I doubt this statement, because I have only heard it from people and have never seen the relevant research data. But I do know that there are institutions in Shanghai that have tested tea rust and analyzed that it contains griseofulvin, which has anti-inflammatory effect.

Of course, if you don't use it for a long time, you'd better wash it off to avoid mildew and so on.