TCM Properties

Traditional Use

Clears Liver Heat and brightens the eyes - classically used for night blindness, blurred vision, red painful eyes, corneal cloudiness, and visual obstruction when heat rises to the eyes and disturbs the Liver blood level.
Invigorates Blood and dispels stasis in the eye region - especially suited to visual disorders complicated by blood stasis such as subconjunctival hemorrhage, persistent visual haze, or fixed eye pain with heat signs.
Disperses accumulation and reduces childhood nutritional impairment - used in pediatric gan ji patterns with abdominal distention, poor appetite, emaciation, and digestive stagnation rather than in simple adult indigestion.
Moves constrained Blood beyond the eyes - later traditions extend its use to abdominal masses and traumatic pain when blood stasis and heat combine.

Traditional eye-focused food therapy often places powdered Ye Ming Sha inside pork or chicken liver before steaming, linking the herb's Liver channel action with a classic nutritional delivery method.
Dry-frying and cloth-wrapping are not minor preparation details but essential handling methods to reduce odor, particulates, and contamination concerns before internal use.

Bu Dai Wan (布袋丸) - the best-known formula containing Ye Ming Sha, used for childhood nutritional impairment with parasite-like accumulation, poor appetite, abdominal distention, and lingering heat.
Ye Ming Sha Zhu Gan Fang (夜明砂煮肝方) - traditional food-therapy preparation in which powdered Ye Ming Sha is cooked inside animal liver for night blindness, corneal cloudiness, and other Liver-heat eye disorders.

Shen Nong Ben Cao Jing first recorded the substance under the older name Tian Shu Shi (天鼠屎), establishing its long classical use despite its unusual animal-fecal origin.
Ben Cao Yan Yi expanded its use beyond ophthalmology to childhood nutritional impairment, showing that the herb was understood to disperse accumulation as well as brighten the eyes.
De Pei Ben Cao and related later texts caution against pregnancy use, while older compatibility traditions state that Ye Ming Sha is averse to Bai Lian and Bai Wei.

Complex insect-derived proteins and chitin fragments (biological matrix) - reflect the insect-rich dietary residue that characterizes the medicinal material
Fatty acid and sterol residues (lipid fraction) - likely contribute to the nonpolar fraction studied in modern extract work
Mineral and trace-metal fraction (inorganic residue) - a quality-critical component because contamination burden can be clinically relevant
Microbial and fermentation-modified metabolites (processed bioactive fraction) - become especially relevant when the material is fermented or stir-processed before extract testing

Modern literature remains sparse and largely descriptive - a systematic review of fecal medicines summarized Ye Ming Sha's historical uses, species origins, and the need for stronger pharmacologic validation rather than providing robust clinical efficacy evidence (PMID 31528199)
Quality-control research - DNA metabarcoding of Faeces Vespertilionis identified major bat-source species and insect dietary composition, improving authentication of this complex medicinal material (PMID 35013500)
Safety-oriented microbiology - bat feces were shown to harbor potentially pathogenic bacteria, reinforcing the traditional insistence on processing and the modern need for contamination control (PMID 36287057)

Although classically listed as non-toxic, Ye Ming Sha is a high-scrutiny animal fecal medicine that may carry pathogenic microorganisms, parasites, and relatively elevated heavy-metal burden if poorly processed
Always use material that has been properly cleaned and dry-fried, and wrap it in cloth for decoction to limit particulate contamination
Classical incompatibility traditions advise caution with Bai Lian and Bai Wei
MSK page not found - drug interaction data not available from Memorial Sloan Kettering integrative medicine database