Efficacy and role of grass fruit extract: 1. The grass fruit has a special rich and spicy fragrance, which can remove fishy smell and increase appetite. It is a good product in cooking seasoning and is known as "one of the five spices" in food seasoning. 2. Grass fruit is used to cook dishes, can remove fishy odor, enhance the taste of the dishes, when cooking fish and meat, with grass fruit its taste is better. 3. When stewing beef and mutton, put some grass fruit, even if the mutton is fragrant and delicious, it can repel the smell of lamb. Blending refined brine and cooking meat, dishes and other flavors, such as Cao Guo beef, and Yunnan specialty seal chicken also uses Cao Guo to flavor. 4. In addition to being a spice, grass fruit also has the effects of dryness, dampness, mildness, and removal of malaria. It is a good medicine for treating symptoms of cold and dampness, food accumulation, diarrhea and malaria. Modern research has found that Cao Guo has antitussive, expectorant, analgesic, antipyretic, antiasthmatic, anti-inflammatory, anti-fungal, gastrointestinal motility and diuretic effects. Single products or extracts are often used for postoperative abdominal distension, diarrhea pain, food swelling, malaria, etc.