Pearl extract

Pearl, finely ground or dissolved into an extract; it is mostly calcium carbonate with a little pearl protein.

What it does: Used in brightening serums, toners, creams and masks for a soft, luminous look, drawing on a long East Asian beauty tradition.
How often: Morning and evening in most everyday skincare; the retinoid snail ampoule is used in the evening, modeling packs weekly, and sheet masks and eye patches at their stated frequency.