Witnessed by: TCM

Human urine sediment (Homo sapiens), of the Hominidae (Mammalia) family. The crust that settles and dries as human urine stands in its vessel; native range: scraped from the urine vessels of the household — a drug of the domestic Chinese pharmacy, not of any field or mine. Globally recognized as ren zhong bai (人中白) in Chinese, and human urine sediment, urine crust in English. The part used is the whitish deposit, scraped, washed, dried and calcined. Light greyish-white crusts and scales, brittle and gritty between the fingers, salty on the tongue, rank with stale urine until calcining burns the smell away.

In this cross-tradition database, we analyze how this substance operates across world medicine systems — tracking its traditional tastes, temperatures, tissue affinities, post-digestive effects, and planetary correspondences across Ayurveda, Unani, and Western herbalism.

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