Science
Mechanism of Action
The PCA component, a natural skin humectant, binds moisture 1.5 times more effectively than glycerin, forming a protective, vapor-permeable surface barrier. Due to its large molecular weight, it remains on the skin's surface, reducing moisture loss and defending against external irritants.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 In hair applications, bis-PCA dimethicone demonstrated 1.5 times greater moisture-binding capacity than glycerin, enhancing conditioning and strengthening chemically treated hair by supporting keratin structure.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
While specific optimal pH for skin stability is not explicit, its PCA groups ionize at elevated pH, which enhances affinity to hair. Silicones are generally water-insoluble and often co-formulated with solubilizers.
Synergies
- volatile amines
- solubilizers
Safety
Safety Profile
The CIR Expert Panel found Dimethicone and related derivatives safe as used in cosmetic formulations when non-irritating, citing unlikely skin absorption due to large molecular weight. It is also FDA-recognized as an OTC skin protectant.
Your Skin
Skin Compatibility
Our Assessment
Verdict
BIS-PCA Dimethicone is a valuable humectant and barrier-supporting ingredient, providing superior moisture retention and protection for all skin types.
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