PCA (Pyrrolidone Carboxylic Acid) is a naturally occurring component associated with the skin’s Natural Moisturizing Factor (NMF). As a highly functional humectant, PCA helps attract and retain moisture at the skin surface, supporting a hydrated, soft, and comfortable skin feel.

Its water-binding properties make PCA a valuable ingredient for moisturizing and skin-conditioning formulations, particularly where maintaining skin hydration and comfort is a key formulation objective.

PCA is not a trend – it’s a biological constant.