Uses: **Medicine Field:** It can participate in various physiological processes in the human body and is commonly used in pharmaceutical preparations. For example, it can be a component of certain injections to assist in the treatment of some diseases, as well as a raw material for drug synthesis. **Food Field:** As a food nutritional fortifier, it can meet the body's needs for histidine and can be added to specific foods, such as foods for special medical purposes. **Feed Field:** As a feed additive, when added to animal feed, it helps with the growth, development, and health of animals and enhances their immunity.