Humectant

Serica

INCI: SERICA

Reviewed by Emma · Last updated 14 Aug 2026

A natural fibre that conditions and smooths both skin and hair

Best For Skin Types

All, Dry, Mature

Addresses

Dryness, Texture

Usage Frequency

Daily

What Is Serica?

Serica is a natural protein fibre derived from silk. In skincare and haircare formulations, it functions as a conditioning agent that helps to coat and protect the skin and hair surface.

The ingredient works primarily through its ability to form a smooth, protective layer. This makes it a common choice in products designed to improve texture, reduce friction, and enhance the feel of both skincare and haircare formulations.

How It Works

Serica conditions the skin by forming a thin, protective layer on the surface. This coating reduces water loss and creates a smoother feel underfoot, which can make fine lines and texture appear less pronounced in the short term.

As a humectant, the ingredient also has the capacity to draw moisture from the environment into the outer layers of skin, though the extent of this effect in typical formulations remains modest compared to stronger humectants.

Clinical Evidence & References

Research specifically examining serica's efficacy in skincare is limited. The ingredient is well-established in cosmetic use and is generally recognised as safe, but robust clinical studies demonstrating measurable improvements in skin condition are sparse.

Most evidence for its benefits comes from its established use in formulations and its recognised conditioning properties. If you are considering serica for a specific skin concern, it is best viewed as a supportive ingredient rather than a primary active.

How to Use

Serica is typically used in formulated products rather than as a standalone ingredient. It works well in combination with other humectants and emollients. Apply products containing serica to clean skin, and layer with other actives as needed according to your routine. No special handling or timing is required.

Safety & Precautions

Serica is generally well-tolerated and suitable for most skin types. Those with silk allergies should avoid products containing this ingredient.

Frequently Asked Questions

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Part of a family

Serica is a variant of Silkworm Extract, the form you will most often see on an ingredients list.

A traditional extract with emerging research into skin-conditioning and inflammatory response

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