Science
Mechanism of Action
This ingredient operates by forming a continuous, protective layer upon application to the skin. The introduced sulfonate groups enhance the inherent keratin's water solubility and hydrating capabilities. This film provides a physical barrier, shielding the skin from external elements and effectively sealing in hydration, leading to improved skin texture and suppleness.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Sulfonation significantly improves keratin's natural water insolubility, allowing for extraction in aqueous solutions. For optimal solution stability, it is advisable to maintain the formulation's pH outside the isoelectric points of keratin types I (pH 4.75–5.40) and II (pH 5.00–6.7), as aggregation and precipitation can occur within these ranges.
Synergies
- Amidoamine cationic surfactants (due to ionic attraction)
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel concluded that Sulfonated Keratin is safe under current usage practices. However, its reported use in cosmetic skin formulations is not prevalent. As an animal-derived ingredient, rigorous pathogen testing is essential to ensure safety, though EU regulations do not restrict its use, with the exception of hydrolyzed hair keratin.
Your Skin
Skin Compatibility
Our Assessment
Verdict
While deemed safe by CIR and offering theoretical skin protection and hydration benefits, Sulfonated Keratin lacks reported current cosmetic use in skin formulations and supporting clinical data for topical efficacy, warranting further investigation for precision skincare applications.
Related
Similar Ingredients
Finding similar ingredients…
References
Sources