Calcined oyster shell

Ingredient Profile

Modern Research Perspective

Calcined Oyster Shell is composed mainly of calcium carbonate and related mineral fractions. Experimental research has examined acid-buffering, mineral, bone, and tissue-repair properties, but bioavailability depends on particle size, preparation, purity, and gastrointestinal conditions.

Clinical evidence for the calcined shell as a standardized single material is limited. Contaminant testing, calcium exposure, renal and gastrointestinal safety, and interactions with medicines require assessment; mineral experiments do not establish disease-specific efficacy.

Traditional Function

Calcined Oyster Shell is traditionally salty and slightly cold. It is used to calm the spirit, anchor yang, soften hardness, and control acid regurgitation or excessive sweating. Calcination and mineral preparation are part of its medicinal identity and affect interpretation and safety.