OSTREA SHELL POWDER.

This ingredient functions as a mild physical exfoliant, using its fine particles (ideally 1-10 µm) to mechanically remove dead skin cells and impurities, thereby unclogging pores and refining skin texture. It contributes to skin health through its high content of minerals such as calcium, magnesium, and zinc, along with B vitamins and amino acids, supporting cellular regeneration and overall skin metabolism. Components derived from oyster shells have demonstrated anti-inflammatory effects by decreasing intracellular reactive oxygen species (ROS) and inhibiting pro-inflammatory mediators like TNF-α and IL-1β. Furthermore, certain forms, like baked oyster shell powder (quicklime, CaO), exhibit strong alkalinity (pH ~12) that provides antimicrobial action by disrupting bacterial cell membranes. Oyster shell extracts also show a capacity to enhance the catabolic pathway of human dermal fibroblasts, suggesting a role in tissue remodeling and potentially anti-fibrotic effects. It may also assist in balancing sebum production.