Potassium Undecylenoyl Hydrolyzed Soy Protein

What is Potassium Undecylenoyl Hydrolyzed Soy Protein?

Potassium Undecylenoyl Hydrolyzed Soy Protein originates from soybeans, where proteins undergo hydrolysis to yield peptides, followed by attachment of undecylenoyl chains from undecylenic acid and potassium neutralization for solubility. It falls into conditioning agents and emulsion stabilizers used mainly in hair products like shampoos and conditioners, and occasionally in skin lotions. This ingredient works through its amphiphilic structure: peptide portions interact with water, while fatty chains anchor to surfaces. On hair, it deposits a lubricious layer to cut friction and boost slip. For skin, it hydrates superficially and smooths texture. In emulsions, it reinforces droplet interfaces, hindering coalescence and maintaining blend integrity for consistent application.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 1 View on EWG →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Emulsion stabilizer
Improves emulsion robustness by preventing droplet coalescence and phase separation, often by thickening, structuring, or strengthening the interfacial layer.
Hair conditioning
Improves softness, shine, and manageability by reducing friction and static; commonly achieved with cationic agents, silicones, oils, or conditioning polymers.
Skin conditioning agent
Maintains skin softness, smoothness, and flexibility.

Benefits

Supports stable product textures by preventing emulsion breakdown.

Enhances hair manageability and softness during washing.

Promotes smoother skin feel in conditioning formulas.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit Who Should Avoid
Users of daily hair care needing better detangling.
Those with soy protein sensitivities.
People with normal to dry hair seeking gentle conditioning.
People prone to contact allergies from hydrolyzed proteins.
Individuals using lotions or creams for subtle smoothness.
Users avoiding ingredients derived from legumes.

Safety Notes

  • Considered low hazard in cosmetic evaluations.
  • Non-comedogenic profile suits various skin types.

Frequently Asked Questions about Potassium Undecylenoyl Hydrolyzed Soy Protein

What makes this ingredient conditioning?

Its structure allows film formation on hair and skin to reduce friction and add smoothness.

Is it suitable for emulsions?

Yes, it strengthens interfacial layers to prevent phase separation in creams and lotions.

Does it pose allergy risks?

Individuals sensitive to soy should patch test, as hydrolysis may not eliminate all triggers.