Yeast Polysaccharides

What is Yeast Polysaccharides?

Yeast polysaccharides consist of complex carbohydrates extracted from yeast cell walls, typically from Saccharomyces cerevisiae via fermentation or hydrolysis. Commonly found in moisturizers, serums, creams, and protective formulations, they work by creating a flexible, occlusive layer on the skin to minimize moisture loss and block external aggressors like pollutants. Their humectant properties draw water to the skin, promoting suppleness, while molecular interactions with skin components enhance barrier integrity. In formulations, they adjust thickness for optimal spreadability and stability, ensuring even application without greasiness. Derived naturally, they offer multifunctional support in daily skincare routines focused on hydration and defense.

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:

Film former

Creates a continuous film on skin or hair to improve wear, water resistance, transfer resistance, shine, or hold in sunscreens, makeup, and styling products.

Skin conditioning agent

Maintains skin softness, smoothness, and flexibility.

Viscosity controlling agent

Adjusts thickness to the desired level for stability and usability, improving dispensing, suspension, and texture across many formulation types.

Skin protecting

Forms a barrier to protect skin from external irritants.

Benefits

Supports skin softness and flexibility through conditioning effects.

Provides a barrier that helps protect against daily irritants.

Enhances product texture for better application and feel.

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 with dry or dehydrated skin seeking moisture retention.	Those with known yeast or fungal allergies.
People wanting added protection in urban environments.	People experiencing reactions to polysaccharide-based ingredients.
Users preferring natural-derived texture enhancers in routines.	Individuals sensitive to fermented extracts, though rare.

Safety Notes

Considered low hazard for cosmetic use based on safety assessments.
Non-comedogenic and suitable for most skin types with proper patch testing.

Frequently Asked Questions about Yeast Polysaccharides

Is yeast polysaccharides comedogenic?

No, it has a comedogenic rating of 0, suitable for acne-prone skin.

What skin types suit yeast polysaccharides?

Most types, especially dry or normal skin, due to conditioning and protective roles.

Are yeast polysaccharides natural?

Yes, derived from yeast cell walls through extraction processes.