# TETRAPEPTIDE-138

URL: https://app.greenveil.ai/ingredients/ingredient_inci_tetrapeptide_138
Categories: beauty
Functions: Humectant, Skin conditioning, Hair conditioning
Identifier: TETRAPEPTIDE-138

> TETRAPEPTIDE-138: Used in cosmetics as a humectant, a skin-conditioning agent and a hair conditioner. Canonical ingredient record built from 1 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 1 public-source records.

## Regulatory status

- EU: Active — Tetrapeptide-138 is the synthetic peptide consisting of arginine, glutamine, leucine and tryptophan.

## 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/105403

_Assessed by Greenveil._