POTASSIUM ALUM is graded A (Safe) by Expert·ING, based on COSING, FDA regulatory data.

POTASSIUM ALUM

Safety grade: A

Potassium alum is a naturally occurring mineral salt that has been used for centuries in personal care products. It works by tightening and drying out the skin, making it feel smoother and more refined.

This ingredient is used as an astringent to tighten pores, reduce oiliness, and help minimize the appearance of skin imperfections by contracting skin tissues.

Graded using: COSING, FDA.

Last verified: May 26, 2026