Is Glyoxyloyl carbocysteine Banned? EU vs US Status, Risks & Where It Hides
TL;DR: Glyoxyloyl carbocysteine is banned in the EU but allowed in the US (formaldehyde releasers).
INCI name Glyoxyloyl Carbocysteine.
Is Glyoxyloyl carbocysteine banned in the EU?
| EU status | Banned |
|---|---|
| US status | Allowed |
| Risk level | high |
| Where it shows up | hair straightening treatment |
What is Glyoxyloyl carbocysteine?
Glyoxyloyl carbocysteine is a preservative that slowly releases formaldehyde to kill bacteria in water-based personal-care products.
Why is Glyoxyloyl carbocysteine used in personal-care products?
It extends shelf life cheaply by releasing low levels of formaldehyde over time.
Is Glyoxyloyl carbocysteine dangerous? Documented risks
Formaldehyde is a known human carcinogen and a common skin sensitizer. The EU restricts formaldehyde-releasing preservatives and requires warning labels; Washington State is phasing them out, while they remain unrestricted federally in the US.
Products that may contain Glyoxyloyl carbocysteine
- hair straightening treatment
How to avoid Glyoxyloyl carbocysteine: safer alternatives
Choose 'formaldehyde-free' products and EU-compliant brands; look for preservatives like sodium benzoate or potassium sorbate. BannedPantry flags formaldehyde releasers on the INCI list.
Frequently asked questions about Glyoxyloyl carbocysteine
Is Glyoxyloyl carbocysteine banned in the EU?
Glyoxyloyl carbocysteine is restricted under the EU Cosmetics Regulation (1223/2009), but it is allowed in US personal-care products.
Is Glyoxyloyl carbocysteine in US cosmetics?
Yes — Glyoxyloyl carbocysteine can still appear in US-sold cosmetics and personal-care products because US rules are far less restrictive than the EU's.
What products contain Glyoxyloyl carbocysteine?
Read the INCI ingredient list on the back of the package. Scan the barcode with BannedPantry to flag Glyoxyloyl carbocysteine automatically.
Are there safer alternatives to Glyoxyloyl carbocysteine?
Yes. Look for EU-compliant or 'free-from' formulations; BannedPantry suggests safer swaps when it detects Glyoxyloyl carbocysteine.
Scan any product's barcode and instantly see if it contains Glyoxyloyl carbocysteine or other ingredients banned overseas.
Scan a product free →Related formaldehyde releasers
Avoiding banned beauty ingredients? Check your food, too.
Sources
- Formaldehyde releasers in common personal-care products — Silent Spring Institute
- Washington Toxic-Free Cosmetics Act implementation — Toxic-Free Future
- EU Cosmetics Regulation Annex II (prohibited substances) — EU Cosmetics Regulation 1223/2009
Our scores are never influenced by brands. Last updated 6/11/2026.