Ren Zhong Bai (Urine Sediment) (Grayish-white appearance, layered cross-section, urine odor)

【Naming】

Ren Zhong Bai (Urine Sediment)

 【Source】

Tang Ben Cao (Tang Materia Medica)

 【Common Usage Level】

E

 【Botanical Origin】

Solid matter naturally precipitated from human urine.

 【Characteristics】

It appears as irregular fragments of varying sizes and thicknesses, generally about 3-5mm thick. The outer surface is grayish-white, smooth, or uneven with nodular protrusions; sometimes one side is smooth, while the other side is porous and uneven. It is hard and brittle, easily broken, and has a layered cross-section. It has a urine odor.

 【Processing】

1. Ren Zhong Bai (Urine Sediment) 2. Calcined Ren Zhong Bai (Urine Sediment) 3. Water-levigated Ren Zhong Bai (Urine Sediment)

 【Identification】

《Zheng Lei Ben Cao》: “Urine from boys is preferred.” 《Ru Men Shi Qin》: “Ren Zhong Bai (Urine Sediment) is best in the twelfth lunar month.” 《Ben Cao Gang Mu》: “That which has been dried by wind and sun for a long time is good.” 《Yao Xing Qie Yong》: “It is best to scrape it from the urine buckets of boys.” 《Wen Tang Ji Yan Fang》: “Use Ren Zhong Bai (Urine Sediment) in the early stages. (That is, the white sediment that settles in the urine jar over many years. That which has been dried by wind and sun for a long time is good.)” 《Wen Tang Ji Yan Fang》: “Ren Zhong Bai (Urine Sediment), that which is self-made is good.” 《Hui Sheng Ji》: “Ren Zhong Bai (Urine Sediment) from urine pots is good.”
That which is dry, grayish-white in color, hard in texture, and free of impurities is good. Dark gray in color, with brick debris and impurities, is not suitable for medicinal use.

 【Category】

Vertebrate Class