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

CYSTEAMINE SULFATE

Safety grade: A

A protein-building compound that works to lighten skin tone and reduce the appearance of dark spots and discoloration. It helps break down melanin, the pigment responsible for skin darkening, making it commonly used in brightening and anti-aging skincare products.

Graded using: COSING.

Last verified: June 9, 2026