Chopsticks are used to hold food and rice. Brass is a metal. In the diet, salt (NaCl) is often used for seasoning, and weak acids, such as white vinegar and vinegar, are occasionally used. According to the order of metal activity, copper cannot replace hydrogen ions and sodium molecules.
Potassium, calcium, sodium, magnesium, aluminum, manganese, zinc, iron, tin, lead (hydrogen), copper, mercury, silver and platinum.
Therefore, brass chopsticks are harmless to human body, so be careful not to rust.