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ISOSTEAROYL HYDROLYZED SILK.

Valuable / SKIN CONDITIONING

Derived from hydrolyzed natural silk proteins, Isostearoyl Hydrolyzed Silk is a sophisticated ingredient known for its multifaceted benefits in skincare. It delivers essential amino acids to the skin, promoting hydration, enhancing barrier function, and supporting the skin's structural integrity to reduce the appearance of aging.

Skin Conditioning Hydrating Humectant Barrier Support Anti-aging Firming Soothing Anti-inflammatory Antioxidant Permeation Enhancer

Science

Isostearoyl Hydrolyzed Silk is created by breaking down natural silk proteins into smaller, highly bioavailable peptides and amino acids like glycine, alanine, and serine. These amino acids penetrate the skin's outer layers, acting as vital building blocks that support the synthesis of collagen and elastin, key proteins for skin firmness and flexibility. It functions as a potent humectant, drawing and retaining moisture to plump skin cells and diminish the visibility of fine lines. Furthermore, its film-forming capabilities establish a protective barrier, reducing transepidermal water loss and offering defense against environmental aggressors. The ingredient also contributes to a fortified skin barrier, reducing redness and inflammation, and may offer antioxidant benefits by neutralizing free radicals, all while potentially improving the absorption of other active ingredients.


Research

Low confidence
Effective range N/A
Optimal

N/A


Transparency

Not commonly dusted

The Formula

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

As an oil-soluble derivative, Isostearoyl Hydrolyzed Silk integrates effectively into anhydrous formulations, such as specific facial or hair oils. While optimal pH ranges of 4.0-5.5 or 6-7 are noted for Hydrolyzed Silk in water, this specific oil-soluble form demonstrates good overall stability and compatibility across various cosmetic matrices.

Synergies

  • Enhances the penetration of other active ingredients

Safety

CIR Status
Safe as used
Max tested
20%
Sensitization risk Low

The CIR Expert Panel has deemed Hydrolyzed Silk and related silk proteins safe for cosmetic use, concluding that concentrations up to 20% are non-irritating and non-sensitizing in human skin tests. Although Isostearoyl Hydrolyzed Silk was not explicitly listed, the safety assessment for the broader class of hydrolyzed silk ingredients applies. It is not restricted under EU cosmetic regulations.


Your Skin

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Valuable

Isostearoyl Hydrolyzed Silk is a valuable, well-tolerated ingredient offering significant benefits in skin hydration, barrier reinforcement, and age-defying support, making it suitable for a wide range of formulations and skin types.


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