Hydrolyzed Sericin

What is Hydrolyzed Sericin?

Hydrolyzed sericin originates from sericin, a natural protein comprising up to 30% of silkworm cocoons produced by Bombyx mori. This glue-like substance binds silk fibroin fibers. Through hydrolysis, it breaks into smaller peptides, improving water solubility for cosmetic formulations. Typically appearing as a clear to pale yellow liquid or powder, it belongs to the protein-derived conditioning category. In skincare and haircare products like creams, serums, shampoos, and conditioners, it functions primarily as a humectant, drawing moisture to the surface, and a film-former, creating a protective layer that reduces water loss and friction. Its mild cationic nature aids in static control and manageability, making it suitable for rinse-off and leave-on applications across various product types.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 1-2 View on EWG →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

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 skin hydration by attracting and retaining moisture on the surface.

Enhances hair softness and shine by smoothing the cuticle and reducing friction.

Forms a lightweight film that promotes smoothness without heaviness.

Who It's For

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

Who May Benefit Who Should Avoid
Individuals seeking added moisture for dry or rough skin.
People with known allergies to silk or silkworm proteins.
People with frizzy or tangled hair looking for better manageability.
Individuals sensitive to protein-based ingredients in cosmetics.
Those desiring a gentle conditioning boost in daily routines.
Those preferring fully vegan or animal-free product formulations.

Safety Notes

  • Rated low hazard by EWG with scores of 1-2.
  • Non-comedogenic, unlikely to clog pores.

Frequently Asked Questions about Hydrolyzed Sericin

What is hydrolyzed sericin made from?

It comes from sericin protein in silkworm cocoons, broken down into soluble peptides.

Is it safe for sensitive skin?

Generally low irritation potential, but patch test if allergic to silk.

What products contain it?

Common in moisturizers, conditioners, serums, and hair treatments.