Because mung beans contain tannic acid, under high-temperature conditions, it will react with iron to form black iron tannate, which will turn the mung bean soup black and give it a special odor. This not only affects the appetite and taste but is also harmful to the human body. 2. Do not decoct Chinese medicine in stainless steel or iron pots.
Because Chinese medicine contains various alkaloids and other biochemical substances, under heating conditions, it will undergo various chemical reactions with stainless steel or iron, which can render the medicine ineffective and even produce certain toxicity. 3. Do not use tallow tree wood or other odorous wood for cutting boards.
Tallow tree wood contains odors and toxic substances. Using it for a cutting board will not only contaminate the food but can also easily cause vomiting, dizziness, and abdominal pain. Therefore, the preferred woods for making cutting boards in folk tradition are ginkgo wood, honey locust wood, birch wood, and willow wood. 4. Do not use painted or carved bamboo chopsticks.
The paint on chopsticks contains chemical substances such as lead and benzene, which are harmful to health. Carved bamboo chopsticks may look beautiful, but they are prone to accumulating dirt and breeding bacteria, making them difficult to clean. 5. Do not use various patterned porcelain containers for condiments.
Patterned porcelain contains harmful and carcinogenic substances such as lead and benzene. As the porcelain ages and deteriorates, the radon in the patterned pigments can contaminate the food and is harmful to the human body. Condiments are best stored in glass containers.