Safety Assessment of PCA (2-Pyrrolidone-5-Carboxylic Acid) and Its Salts as Used in Cosmetics.

What was studied

PCA itself is explicitly listed, CAS 98-79-3, separately from its salts. Safety assessment, not a hydration efficacy trial. Group data include substantial sodium PCA evidence. Findings are limited to the report's cosmetic uses and concentrations.

Checked against the published abstract on Oct 1, 2026. Read the source ↗