Science
Mechanism of Action
Dehydroacetic Acid (DHA) acts as an antimicrobial preservative by impeding the proliferation of various microorganisms, including bacteria, yeast, and mold. Its primary mechanism involves disrupting the cellular membrane of these microbes, specifically by binding to phospholipid head groups, which compromises their structural integrity and ultimately leads to cell death. While effective against a range of microorganisms, its action is particularly potent against fungi, with a milder yet significant effect on bacteria.
Research
Clinical Evidence
High confidenceN/A
Transparency
Dusting Analysis
Dehydroacetic Acid functions as a preservative rather than an active ingredient, and its concentration is precisely controlled for microbial efficacy and safety, making 'dusting' for marketing claims irrelevant.
The Formula
Formulation
Stability
Dehydroacetic Acid exhibits good thermostability and general stability under typical handling and storage conditions. Its antimicrobial efficacy is optimal within an acidic pH range, specifically between 2 and 4, and generally efficient below pH 5.5. It is hygroscopic, necessitating protection from moisture, excessive heat, and direct sunlight during storage.
Conflicts
- strong oxidizing agents
- bases
- certain incompatible components (can compromise preservative function)
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has consistently affirmed Dehydroacetic Acid's safety in cosmetics at current usage concentrations, with reaffirmations in 2003 and 2023. While generally regarded as non-irritating, there have been isolated reports of hypersensitivity reactions to Sodium Dehydroacetate in specific medical applications. It's important to distinguish Dehydroacetic Acid (DHA) from Dihydroxyacetone (DHA), a common self-tanning agent, as the latter is a different chemical entity with separate safety profiles.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Dehydroacetic Acid is an essential ingredient in modern skincare, providing robust broad-spectrum preservation at low concentrations to ensure product safety and longevity across diverse formulations and skin types.
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