# SR-CAT POLYPEPTIDE-4

URL: https://app.greenveil.ai/ingredients/ingredient_inci_sr_cat_polypeptide_4
Categories: beauty
Functions: Antioxidant, Hair conditioning, Skin protecting
Identifier: SR-CAT POLYPEPTIDE-4

> SR-CAT POLYPEPTIDE-4: Used in cosmetics as an antioxidant, a hair conditioner and a skin protectant. Canonical ingredient record built from 2 public-source records. Compiled from 1 published data source.

## Safety assessment

- Chemical concern: not yet assessed
- Is it a concern? We haven't assessed a concern score for this ingredient yet. It is listed for cosmetic use in the EU.
- Rationale: Canonical ingredient record built from 2 public-source records.

## Regulatory status

- EU: Active — sr-Cat Polypeptide-4 is a single chain recombinant protein produced by fermentation in E. coli. The starting gene is synthesized to be identical to the gene which codes for Insulin-Like Growth Factor derived from cat. The parent protein contains a maximum of 137 amino acids which may contain disulfide bonds and/or glycosylation, and consists of the proper sequence of the 20 standard amino acids.
- EU: Active — sr-Dog Polypeptide-4 is a single chain recombinant protein produced by fermentation in E. coli. The starting gene is synthesized to be identical to the gene which codes for Insulin-Like Growth Factor derived from dog. The parent protein contains a maximum of 153 amino acids which may contain disulfide bonds and/or glycosylation, and consists of the proper sequence of the 20 standard amino acids.

## Expert safety opinions

- SCCS (EU Scientific Committee on Consumer Safety): no opinion on file.
- CIR (Cosmetic Ingredient Review (US expert panel)): no opinion on file.

## Data sources

- CosIng (updated 2026-09-23): https://ec.europa.eu/growth/tools-databases/cosing/details/97258

_Assessed by Greenveil._