High Concern

Dmdm Hydantoin

Flagged by EWG Skin Deep as a formaldehyde releaser concern

What it is

A formaldehyde-releasing preservative used in shampoos and conditioners. Releases formaldehyde slowly over time.

Found in 10 products on this site

Sorted worst score first. Lower score = more concerning overall formulation.

Products that avoid this ingredient

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