Science
Mechanism of Action
This ingredient functions by slowly releasing low levels of formaldehyde, which acts as an antimicrobial agent. This process inhibits the proliferation of fungi, yeast, and various bacteria, thereby safeguarding cosmetic formulations from degradation.
Research
Clinical Evidence
High confidence0.15%
Transparency
Dusting Analysis
DMDM Hydantoin is a liquid preservative and not an ingredient typically 'dusted' or applied in powdered form.
The Formula
Formulation
Stability
Retains activity across a broad pH range of 3-10, with ideal performance from pH 4-10. For optimal stability, it should be incorporated into formulations at temperatures below 40°C, or at or below 60°C during pre- or post-emulsification phases to prevent decomposition.
Conflicts
- Ingredients known to amplify free formaldehyde release
- Formulations intended for individuals with diagnosed formaldehyde sensitivity
- Products marketed with a 'formaldehyde-free' claim
- Formulations designed for ultra-sensitive skin or infant care
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel deemed DMDM Hydantoin safe at current usage levels, a conclusion reconfirmed in 2005. However, as a formaldehyde-releasing agent, it is recognized by the FDA as a potential allergen. Approximately 8-9% of the U.S. population may develop contact dermatitis from formaldehyde exposure. It exhibits poor skin absorption. Notably, some countries have implemented bans on this ingredient due to its potential side effects. The maximum approved concentration is 1% in the USA and 0.6% in the EU.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Due to its mechanism as a formaldehyde-releaser, high irritancy potential, and significant risk of allergic reactions in a subset of the population, DMDM Hydantoin is not recommended for Moumoujus formulations.
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