DMDM Hydantoin is a formaldehyde-releasing preservative used in cosmetics and personal care products to prevent microbial growth and extend shelf life. It works by slowly releasing small amounts of formaldehyde into the formulation.
| Reported effect | How often | Notes |
|---|---|---|
Allergic contact dermatitis | Uncommon | A recognized cause of cosmetic-related contact allergy, often in formaldehyde-sensitive individuals. |
Skin irritation (redness, itching, burning) | Uncommon | More likely with higher concentrations or in those with sensitive or compromised skin. |
Formaldehyde sensitization/cross-reactivity | Rare | Can sensitize individuals to formaldehyde or trigger reactions in those already formaldehyde-allergic. |
Eye or mucous membrane irritation | Rare | Reported with formulations contacting the eye area at higher levels. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.