Hero Ingredient Landing
Back to search

DMDM Hydantoin

Bad

Preservative

No known benefits

DMDM Hydantoin description

DMDM hydantoin is a synthetic, formaldehyde-releasing preservative that has mixed research on its potential to aggravate skin. Despite its connection to formaldehyde, the Cosmetic Ingredient Review Board has confirmed the safety of this preservative in three separate reviews, each spaced several years apart.

Related ingredients: Formaldehyde-Releasing Preservative

Back to search

DMDM Hydantoin references

  • Medocyna Pracy, Volume 66, Issue 3, 2015, pages 327-332
  • Contact Dermatitis, January 2010, pages 18-31
  • http://www.cosmeticsinfo.org/ingredient/dmdmhydantoin

Peer-reviewed, substantiated scientific research is used to assess ingredients in this dictionary. Regulations regarding constraints, permitted concentration levels and availability vary by country and region.

Ingredient ratings

Best

Proven and supported by independent studies. Outstanding active ingredient for most skin types or concerns.

Good

Necessary to improve a formula's texture, stability, or penetration.

Average

Generally non-irritating but may have aesthetic, stability, or other issues that limit its usefulness.

Bad

There is a likelihood of irritation. Risk increases when combined with other problematic ingredients.

Worst

May cause irritation, inflammation, dryness, etc. May offer benefit in some capability but overall, proven to do more harm than good.

unknown

We couldn't find this in our ingredient dictionary. We log all missing ingredients and make continuous updates.

Not rated

We have not yet rated this ingredient because we have not had a chance to review the research on it.