When you enter a large Chinese medicine factory, you will know that it is no problem to cook Chinese medicine with stainless steel pot. I see that many large Chinese medicine factories are made of stainless steel, which is used to boil (extract) Chinese medicine. It can be seen that there is no problem in boiling medicine with stainless steel pot at home. Chinese medicine factories all over the country also use stainless steel as extraction tanks and pipes. The key is to use qualified medical stainless steel.
Only on behalf of personal views, don't spray if you don't like it, thank you.