The amount of chasteberry in water should not exceed 15 grams per day, usually between 5-15 grams. As a traditional Chinese medicine, the efficacy of chasteberry is to nourish the liver and kidney, brighten the eyes and darken the hair. It has a relatively wide range of applications in the clinic, and can treat dizziness, tinnitus, soreness of the waist and knees, premature graying of the hair and beard, and blurred vision of the eyes, etc. Deficiencies of the liver and kidney can be adjusted and treated with chasteberry. Chasteberry has obvious circulatory improvement effects, especially in lowering blood lipids and blood sugar, which have been verified in the clinic and especially in the laboratory. Chasteberry can also protect the liver, adjust the immunity of the body, and can prevent the infection of the body by pathogens such as bacteria and viruses, which can be well carried out by applying chasteberry.