Used as an immunostimulant in cancer therapy, particularly in Japan as an adjuvant for treating gastric cancer. Enhances the body's immune response by activating macrophages, natural killer cells, and T-cells. Commonly administered intravenously in clinical settings to improve survival rates and quality of life in patients undergoing chemotherapy. Also studied for potential antiviral and anti-inflammatory effects. Investigated for use in combination with other immunotherapies to boost efficacy. Not effective as a standalone treatment but shows promise as a supportive agent in oncology.