1. Smilax glabra and Ficus hirta are Chinese herbal medicines. The chemical properties of iron molecules in iron pots are relatively active, and it is easy to react with tannins in Chinese herbal medicines to generate iron tannins, which will deepen the color of the liquid medicine, make the liquid medicine bitter and rusty, affect the efficacy and taste, and may also produce side effects such as nausea and vomiting. In severe cases, it may also produce toxic reactions, which directly affect the quality of decoction.

2. The chemical composition of Chinese herbal medicine is complex or has not been cracked for the time being, so Chinese medicine warns: Do not cook Chinese herbal medicine with tin, lead, copper, iron pots, utensils, etc. Traditional medicine pots, pottery pots and casseroles are recommended as the best.