Science
Mechanism of Action
As a surfactant, Sodium Cocoyl Amino Acids decrease surface tension, utilizing both hydrophilic (water-attracting) and hydrophobic (oil-attracting) ends to efficiently emulsify and lift oils and impurities from the skin. Specific variants, such as Sodium Cocoyl Glycinate, enhance skin compatibility by gently interacting with skin proteins and lipids, thereby supporting the preservation of the skin's pH and structural integrity during cleansing, preventing over-stripping of natural oils.
Research
Clinical Evidence
High confidenceConcentrations vary by product type: 0.4-1% for leave-on products, 0.4-2.8% for rinse-off applications, and up to 20% in cleansers depending on co-surfactants.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Amino acid surfactants exhibit pH sensitivity, meaning their efficacy may be diminished at excessively high or low pH values. While some specific types, like Sodium Cocoyl Glycinate, perform optimally within a neutral to slightly alkaline pH range (7-9), others, such as Sodium Cocoyl Apple Amino Acids, demonstrate stability across a pH range of 4.5-7.5.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel concluded that amino acid alkyl amides, including Sodium Cocoyl Amino Acids, are safe when formulated to be non-irritating under current cosmetic use practices. Although severe irritation was noted at 5% for a related compound (Sodium Cocoyl Glutamate) in one study, this was not consistently observed. No specific SCCS or FDA regulatory status beyond general cosmetic registration is documented.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Sodium Cocoyl Amino Acids are a versatile and gentle ingredient, highly effective for cleansing across all skin types without compromising skin barrier integrity or natural pH balance.
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