Chasteberry has the effect of nourishing the liver and kidney, brightening the eyes and darkening the hair, and is used as a main treatment for liver and kidney yin deficiency (deficiency of yin in the liver and kidneys) syndrome. Chasteberry has a sweet, bitter flavor and cool nature, and belongs to the liver and kidney meridians. Chasteberry belongs to the yin tonic among the deficiency tonics, and is indicated for tinnitus, deafness, dizziness, lumbar and knee soreness (a feeling of soreness and weakness in the lumbar and knee regions), and premature whitening of beard and hair caused by yin deficiency of the liver and kidneys. The adverse reactions of this product are not clear, and it is prohibited for those who are allergic to this product. Since the nature of this product is cold, it is easy to aggravate the disease of Yang deficiency, therefore, it should be taken with caution by people with spleen and stomach deficiency (spleen and stomach weakness and cold) and kidney Yang deficiency. Patients who need medication are advised to go to a regular hospital, consult a traditional Chinese medicine practitioner for evidence-based guidance, and follow the doctor’s instructions for standardized treatment, rather than blindly self-medicating to avoid delaying the condition.