Semen Euryales (Qianshi): the mature seed kernel of *Euryale ferox* Salisb., a plant in the Nymphaeaceae (water lily) family.
【Nature, Flavor, and Meridian Tropism】Neutral in nature, sweet and astringent in flavor. It enters the Spleen Meridian of Foot-Taiyin (SP) and the Kidney Meridian of Foot-Shaoyin (KI).
【Actions and Indications】Tonifies the kidney and consolidates essence, supplements the spleen and relieves diarrhea, eliminates dampness and arrests leukorrhea. It belongs to the subgroup of astringent herbs that secure essence, reduce urination, and stop leukorrhea.
[Pharmacological Studies] It exhibits anti-diabetic, antioxidant, and lipid-lowering effects; as well as cardioprotective, antibacterial, anticancer, antidepressant, and hepatoprotective properties.
Euryale ferox, commonly known as Qianshi in traditional Chinese medicine, represents a unique botanical entity within the Nymphaeaceae (water lily) family. This aquatic plant produces seeds that, when processed, yield Semen Euryales, a medicinal substance with profound therapeutic applications. The Euryale ferox seed nutrition profile is remarkably rich, containing high levels of starch, protein, essential amino acids, and bioactive compounds such as flavonoids and polyphenols. These nutritional constituents underpin the seed’s diverse health-promoting properties, which have been recognized in East Asian medicinal systems for centuries. Recent scientific investigations have begun to elucidate the mechanisms behind these traditional uses, revealing that the seeds possess significant antioxidant, anti-inflammatory, and immunomodulatory activities, thereby validating the empirical knowledge of ancient practitioners.
The Euryale ferox health benefits extend across multiple physiological systems, with particular emphasis on renal and digestive functions. According to traditional Chinese medicine theory, Semen Euryales is neutral in nature and possesses sweet and astringent flavors, making it particularly suitable for addressing conditions of deficiency and leakage. Modern pharmacological studies have demonstrated that the seed extracts can enhance kidney function by reducing oxidative stress in renal tissues and improving glomerular filtration rates. Furthermore, the high dietary fiber content and resistant starch in Euryale ferox seeds promote gastrointestinal health by modulating gut microbiota composition and enhancing mucosal barrier integrity. These findings provide a scientific foundation for the traditional use of Qianshi in treating chronic diarrhea and digestive weakness, as the seed’s astringent properties effectively reduce excessive fluid loss while nourishing the spleen.
The role of Qianshi traditional Chinese medicine uses is most prominently exemplified in its application as a Semen Euryales kidney tonic. Within the framework of TCM, the kidney is considered the root of vitality and the storehouse of essence (jing), governing growth, reproduction, and aging. Semen Euryales specifically enters the Kidney Meridian of Foot-Shaoyin (KI) and the Spleen Meridian of Foot-Taiyin (SP), enabling it to tonify the kidney and consolidate essence. Clinical applications include treating conditions such as nocturnal emissions, premature ejaculation, enuresis, and frequent urination—all manifestations of kidney qi deficiency. The astringent nature of the seed helps to “seal” the kidney’s essence, preventing its leakage while simultaneously nourishing the organ. Additionally, its ability to eliminate dampness and arrest leukorrhea makes it invaluable for managing chronic vaginal discharge (leukorrhea) associated with spleen-kidney deficiency patterns, demonstrating the integrated approach of TCM in addressing complex multisystem disorders.
The therapeutic versatility of Semen Euryales is further appreciated through its synergistic effects on multiple meridians and its broad spectrum of clinical indications. As a kidney tonic, it is frequently combined with other herbs such as Dioscorea opposita (Shanyao) and Nelumbo nucifera (Lianzi) to enhance its spleen-strengthening and kidney-nourishing actions. The Euryale ferox health benefits also extend to metabolic health, with studies indicating that regular consumption can improve glucose homeostasis and lipid profiles, potentially benefiting individuals with diabetes or metabolic syndrome. The seed’s neutral thermal nature makes it suitable for long-term use without causing adverse heat or cold effects, a crucial consideration in sustained therapeutic interventions. Contemporary research continues to explore the molecular mechanisms underlying these effects, including the modulation of inflammatory cytokines, regulation of aquaporin expression in renal tissues, and enhancement of mitochondrial function in splenic cells. This convergence of traditional wisdom and modern science positions Euryale ferox as a promising nutraceutical agent for promoting renal and digestive health in both preventive and therapeutic contexts.