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

CYSTEAMINE THIOGLYCOLATE

Safety grade: A

A chemical compound used in hair-straightening and permanent wave treatments that works by breaking down the bonds in your hair structure, allowing it to be reshaped. It helps soften and relax curly or wavy hair to create straighter styles that last through multiple hair washes.

Graded using: COSING.

Last verified: June 9, 2026