PSK, a proteoglycan from Coriolus versicolor, is an immunomodulator which has been used in conjunction with cancer adjuvant immunotherapy in Japan for decades.

• 云芝提取物，来源于云芝的蛋白聚糖，是一种免疫调节剂，它与肿瘤免疫治疗辅剂结合使用，已在日本应用数十年。