Cysteine
Cysteine appears on 2 ingredient lists in our database, most often in hair treatments.
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
Cysteine appears on 2 ingredient lists in our database, most often in hair treatments.
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: antioxidant, antistatic, hair conditioning, hair waving or straightening, fragrance, reducing
Products with Cysteine
in 2 products
- no photoAnaze Colure Blonde Hair Mask PackAnaze · hair treatment
- no photoBenow Inc. Numbuzin zero blemish oil-free micellar Cleansing JellyBenow Inc. · cleanser
Showing 2 of 2 products with this ingredient, most scanned first.
In the EU ingredient database
- antioxidant
- antistatic
- hair conditioning
- hair waving or straightening
- fragrance
- reducing
- antioxidant: Inhibiting reactions promoted by oxygen, thus avoiding oxidation and rancidity.
- 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.
- hair waving or straightening: Modifying the chemical structure of the hair, allowing it to be set in the style required (permanent waves or hair straightening).
CAS 52-90-4 / 3374-22-9 · EC 200-158-2 / 222-160-2
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.