skincarecheck
INCI ingredient

Cystine

Cystine appears on 14 ingredient lists in our database, most often in serums.

What it triggers

  • Vegan originNot sureplant or animal source
  • FragranceNonot a perfume ingredient
  • ParabenNonot a preservative of this family
  • SulfateNonot a sulfate surfactant
  • SiliconeNonot a silicone
  • AlcoholNonot a drying alcohol

What it does

Cystine appears on 14 ingredient lists in our database, most often in serums.

It does not belong to any of the six groups we check, so it never changes a verdict.

We have not written the plain-language note for this ingredient yet; the facts above come straight from how it is classified.

Functions: antistatic, hair conditioning, fragrance

In the EU ingredient database

Functions listed by CosIng
  • antistatic
  • hair conditioning
  • fragrance
  • antistatic: Preventing and/or reducing static electricity by neutralising electrical charge on surfaces.
  • hair conditioning: Enhancing the appearance and feel of hair. Leaving the hair easy to comb, supple, soft and shiny and/or imparting volume, lightness, gloss, texture, etc.
  • fragrance: Imparting an odour or taste. Creating a perceivable pleasant smell and/or masking a bad smell.

CAS 56-89-3 · EC 200-296-3

EU regulation

Not on a restricted-substances annex. Listed as an allowed cosmetic ingredient.

Source: CosIng, European Commission. Informative, no legal value; the regulation text is the reference.

Classification from the INCI name; product lists from Open Beauty Facts.Report a mistake