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CARBOXYMETHYL DISULFIDE KERATIN.

Valuable / HAIR CONDITIONING

A sophisticated, bio-engineered keratin derivative designed to integrate seamlessly with the skin and hair's natural protein architecture. By utilizing specialized disulfide bonds, it provides deep structural reinforcement that persists beyond standard cleansing cycles.

Structural Repair Skin Conditioning Humectant Barrier Fortification

Science

This ingredient operates through 'sorption'—a high-precision process of simultaneous adhesion and absorption. CMADK utilizes its disulfide linkages to chemically anchor itself to native keratin proteins, effectively rebuilding the internal density and moisture-retention capacity of the substrate from within.


Research

High confidence
Effective range ≥1%
Optimal

1%

Key findings

  1. 01 Synchrotron radiation research (SPring-8) confirms that a 1.0% concentration restores internal protein structures and reverses age-related decreases in density.

Transparency

Commonly dusted
Min. effective
0.5%
Red flag below
0.1%

Due to its premium positioning and technical complexity, CMADK is frequently used at 'label-only' concentrations. Formulations containing less than 0.5% likely lack the concentration necessary for meaningful protein sorption.


The Formula

Solubility
Water
Optimal pH 2.5 – 5.5
0 7 14

Stability

The molecule achieves peak performance in acidic environments (pH 2.5–5.5), though it requires specific ionic surfactants to prevent precipitation and ensure clarity.

Synergies

  • Ionic surfactants
  • Low-pH barrier repair actives

Conflicts

  • High-heat processing
  • Low pH environments lacking ionic stabilizers

Safety

CIR Status
Safe as used
Pregnancy
Safe
Sensitization risk Low

Classified as non-irritating and non-CMR (carcinogenic, mutagenic, or toxic for reproduction) based on manufacturer skin patch testing.


Your Skin

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

Our Assessment

Valuable

An elite structural protein that offers unique, wash-resistant restoration for compromised skin and hair barriers.


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References