Emulsifier

Polyglyceryl-6 Polyhydroxystearate

INCI: POLYGLYCERYL-6 POLYHYDROXYSTEARATE

Reviewed by Kate · Last updated 2 Jun 2026

Also known as: Polyglyceryl-6 Polyhydroxystearate

A synthetic emulsifier that helps blend oil and water in skincare formulations

Best For Skin Types

All

Usage Frequency

Daily

What Is Polyglyceryl-6 Polyhydroxystearate?

Polyglyceryl-6 polyhydroxystearate is a synthetic emulsifier derived from glycerin and fatty acids. It belongs to a class of ingredients known as polyglyceryl esters, which are widely used in cosmetic formulations to stabilise mixtures of oil and water-based ingredients that would otherwise separate.

In skincare products, this ingredient works to create stable emulsions — the creams, serums and lotions that combine both hydrating and nourishing components into a single product. It is found in approximately 0.2% of skincare formulations, typically at low concentrations.

How It Works

Emulsifiers like polyglyceryl-6 polyhydroxystearate have a molecular structure with both water-loving (hydrophilic) and oil-loving (lipophilic) regions. These molecules position themselves at the boundary between oil and water phases, reducing the tension between them and allowing the two to mix evenly.

This stabilising action prevents creams and lotions from separating into oily and watery layers, which maintains the product's consistency, texture and efficacy throughout its shelf life.

Clinical Evidence & References

Polyglyceryl-6 polyhydroxystearate is a well-established emulsifying agent with a long history of use in cosmetics. Its safety profile is generally well-documented in cosmetic ingredient databases and regulatory assessments.

However, specific clinical studies examining its direct effects on skin health are limited. Its primary role is functional — to stabilise formulations — rather than to deliver a direct active benefit to skin. Any skin benefits would be indirect, arising from the overall stability and effectiveness of the product it is formulated into.

How to Use

This ingredient requires no special application on the consumer's part; it works behind the scenes in finished products. Simply use the product as directed by the manufacturer. If you are concerned about ingredient sensitivities, patch test the product before full application, as with any new skincare product.

Safety & Precautions

Polyglyceryl-6 polyhydroxystearate is generally well-tolerated and considered safe for topical use in cosmetics at typical concentrations. However, some individuals with fungal acne (Malassezia-prone acne) have reported sensitivities to certain polyglyceryl esters; if you have this concern, you may wish to monitor your skin's response when introducing products containing this ingredient.

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