Fragrance avoidance
Nothing to weigh for this context yet.
We have no published hazard signal for this ingredient, so we cannot say how it behaves in this context — that is missing evidence, not a clean result.
- beauty
Amidinocysteinyl hydrolyzed keratin
Concern score
Not assessed — no hazard data yet.
Amidinocysteinyl hydrolyzed keratin in plain language
Used in cosmetics as an astringent, a hair conditioner and a hair waving or straightening agent. Amidinocysteinyl Hydrolyzed Keratin is the product obtained by the reaction of Amidinocysteine and Hydrolyzed Keratin.
- Astringent
- Hair conditioning
- Hair waving or straightening
- Film forming
- We haven't assessed a concern score for this ingredient yet. It is listed for cosmetic use in the EU.
What we know about this ingredient
Canonical ingredient record built from 1 public-source records.
Regulation
No restrictions found. Amidinocysteinyl hydrolyzed keratin appears in these published regulatory listings.
EUCosIngActiveAmidinocysteinyl Hydrolyzed Keratin is the product obtained by the reaction of Amidinocysteine and Hydrolyzed Keratin.
- Amidinocysteinyl Hydrolyzed Keratin is the product obtained by the reaction of Amidinocysteine and Hydrolyzed Keratin.Source →
Expert safety opinions
No expert opinion on file for Amidinocysteinyl hydrolyzed keratin. These are the independent scientific bodies that assess ingredients like this one; we show an opinion only when a record we hold cites it.
SCCS
EU Scientific Committee on Consumer Safety
No SCCS opinion on file.
CIR
Cosmetic Ingredient Review (US expert panel)
No CIR safety assessment on file.
Evidence & sources
No graded research studies for Amidinocysteinyl hydrolyzed keratin yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.
Where this comes from
- Open →
CosIng
regulatory · updated 2026-09-23
Suitability
Context-specific fit derived from published classifications and the current ingredient evidence profile.
No signal in this context