Ingredient
Methylene Glycol
Risky
What is this ingredient, what does it do?
Hidden formaldehyde (in hair straighteners; banned in the EU)
May cause irritation
What is it, what should you do?
A substance used in hair straightening (keratin) treatments as the dissolved-in-water form of formaldehyde; it releases formaldehyde as a gas during the heat process. Because formaldehyde gas can irritate the respiratory tract and is classified as a carcinogen, the EU banned this use. When getting a hair straightening service, making sure the salon uses a formaldehyde-free product is important for health.
Related ingredients
This is general information, not medical advice. The assessment may vary by skin type.
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