The Historical Origins and Evolution of the Official Name and Efficacy of Mu Tong Fruit

Abstract: Mu Tong fruit (木通果实), whose official name in Zhong Guo Yao Dian (《中国药典》 Chinese Pharmacopoeia ) is Yu Zhi Zi (预知子 Fructus Akebiae), is a commonly used Chinese materia medica in modern clinical practice. However, its ancient and modern records and descriptions differ significantly. The Mu Tong fruit has many alternative names in history. The names commonly used were Yan Fu Zi (燕覆子), Wu Fu Zi (乌覆子), Ba Yue Zha (八月札), etc. Furthermore, there have been many controversies among scholars over the ages regarding the medicinal origin, properties, taste, meridian affinity, and efficacy of the Mu Tong fruit. This study aims to clarify the academic origin and correct misconceptions of the nomenclature of Yu Zhi Zi through a comprehensive analysis of relevant literature. The Mu Tong fruit was primarily used as a food in ancient times, with its “dispersing and regulating” effects first documented in the Tang dynasty. Literature from the Qing dynasty, however, emphasized its “tonifying and replenishing” functions, suggesting a potential bidirectional regulatory capacity. The modern Zhong Guo Yao Dian defines its nature as bitter and cold, with efficacy focused on soothing the liver and regulating qi, circulating blood to relieve pain, dispersing nodules, and promoting urination. It is now widely used in cancer treatment. This study aims to integrate historical and contemporary comparative analyses to distinguish the authenticity and validity of medicinal products and examine the complexities of medicine nomenclature. By clarifying origins, it seeks to facilitate the modern application of ancient knowledge and the convergence of traditional Chinese and Western medicine.