Ingredient glossary
DMDM Hydantoin
INCI: DMDM Hydantoin · Also: Glydant
A preservative doing an unglamorous but essential job: keeping the product safe to use. Not something you pay extra for.
What it does
- preservation
strong evidenceSafety reviews and patch test data indicate DMDM hydantoin at cosmetic use levels is generally safe for non allergic users but eight to nine percent of the population with formaldehyde allergy may react to products containing it or related releasers.
On a label: usually effective at 0.2-0.6%.
Who it's for, and who should skip it
Tends to suit
- all
Approach with care
- formaldehyde allergy
- very sensitive
- Clogs poresLow
- Irritation riskModerate
Pregnancy: Check with your doctor before using during pregnancy or breastfeeding.
Plays well with
- other preservatives
This, for every label you own
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Educational information about a cosmetic ingredient, not medical advice.