According to the query of Dazhong Health Network, the wood residue in the residue pepper is harmless to human body. Zhahai pepper is a kind of food specialty in southwest China. As a family heirloom of Tujia and Miao people, every production process is a continuation of memories and feelings. When making residue pepper, some wood residue is usually added to increase its taste and flavor. These wood residues are usually made of wood or sawdust and become safe and harmless after treatment. Therefore, under normal circumstances, the wood residue in the residue pepper will not cause harm to the human body.