Science
Mechanism of Action
Derived from hair keratin, these amino acids closely resemble the fundamental structural proteins of the skin. Their small molecular weight facilitates efficient absorption into the stratum corneum and the uppermost layers of the epidermis. Within the skin, they function as potent humectants, actively drawing and retaining moisture to significantly boost hydration levels and promote suppleness. They further strengthen the skin's barrier integrity, contribute to pH balance regulation, and aid natural healing processes by supporting the crucial structures of keratin, collagen, and elastin. By augmenting the skin's Natural Moisturizing Factor (NMF) with free amino acids, they lead to a discernible improvement in texture, elasticity, and a plumper, more resilient appearance.
Research
Clinical Evidence
High confidenceEffective concentrations range from 0.5% to 10.0%, with typical usage rates for water-soluble formulations between 1.0% and 5.0%. Concentrations from 1.0% to 10.0% are suggested for optimal moisturizing and conditioning benefits.
Key findings
- 01 Clinical research at concentrations of 0.5% to 2.0% affirms Hair Keratin Amino Acids are safe, well-tolerated, non-carcinogenic, non-sensitizing, and non-comedogenic. Studies highlight their capacity to attract moisture to the skin surface, bolster suppleness, fortify the skin's barrier, alleviate rough and dry patches, enhance overall skin texture, and provide anti-aging advantages by elevating elasticity and hydration.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Hair Keratin Amino Acids are inherently water-soluble and are typically incorporated during the water phase of formulation. The isoelectric point of keratin is approximately 3.8; formulating below this pH imparts a cationic charge, while formulating above it results in an anionic charge, influencing interaction with other components.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has concluded that keratin-derived ingredients, including Hair Keratin Amino Acids, are safe at current usage practices and concentrations up to 10.0%. While animal-derived variants may pose an allergic risk if inadequately refined, necessitating patch tests, the Scientific Committee on Consumer Products (SCCP) regards the risk from properly processed human-derived amino acids as negligible, though human-derived Hydrolyzed Hair Keratin is prohibited in the EU. The FDA regulates cosmetic products for safety and proper labeling, rather than pre-approving individual ingredients.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Hair Keratin Amino Acids are a valuable ingredient for enhancing skin hydration, reinforcing the barrier, and improving overall texture and elasticity across all skin types.
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