Science
Mechanism of Action
This ingredient forms a colloidal polymer complex (gel plug) upon contact with sweat, physically blocking eccrine sweat ducts. This prevents sweat from reaching the skin surface, while also providing mild antibacterial action.
Research
Clinical Evidence
High confidence20%
Key findings
- 01 Regular use at 20% concentration consistently reduces perspiration by approximately 20% to 60%.
- 02 A study with 21% concentration estimated dermal absorption of aluminum to be very low, approximately 0.012%.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Stability and efficacy are highly pH-dependent, with optimal stability maintained between pH 3.0 and 5.0. It is often formulated with glycine as a buffer to prevent excessive acidity.
Conflicts
- Strong bases
- Anionic surfactants
- Certain soaps
- Highly alkaline environments
Safety
Safety Profile
The CIR has deferred evaluation due to extensive assessment by the FDA, which permits up to 20% (anhydrous basis) in OTC antiperspirants. The SCCS notes that 20% concentrations are generally non-irritating to healthy skin.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Aluminum Zirconium Octachlorohydrate is a highly effective antiperspirant ingredient, well-studied and approved for significant sweat reduction with a low irritancy profile.
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