AHC
GLUTA-CTIVATION BRIGHT 3 TREATMENT ESSENCE 130ml$47.50Ingredient·amino acid
Cystine
Cystine is two cysteine molecules joined by a sulphur bridge, the bond that gives keratin its strength. In a formula it is a conditioning amino acid.
Products with Cystine
3 products we sell today declare Cystine on their own ingredient list. Earliest on the list first.
