POLYARGININE HCL is graded A (Safe) by Expert·ING, based on COSING regulatory data.

POLYARGININE HCL

Safety grade: A

A skin-conditioning ingredient derived from the amino acid arginine, this compound helps improve how products feel on your skin and enhances moisture retention. It works to smooth the skin's surface and can help strengthen the skin barrier, making it a common addition to serums, moisturizers, and anti-aging formulas.

Graded using: COSING.

Last verified: June 9, 2026