Stearoyl Inulin

What is Stearoyl Inulin?

Stearoyl Inulin is a modified natural polysaccharide sourced from chicory root inulin, esterified with stearic acid to form a versatile sugar-based surfactant. This plant-derived ingredient bridges hydrophilic and lipophilic phases in formulations, making it ideal for oil-in-water and water-in-oil emulsions found in lotions, creams, cleansers, and shampoos. It works by lowering surface tension to facilitate gentle cleansing and dirt removal while forming stable interfacial films that prevent phase separation, ensuring product consistency and even application. Its emollient nature lubricates the skin surface, enhancing smoothness and reducing dryness without greasiness. As a skin conditioner, it supports the skin's moisture balance and flexibility. Derived from renewable botanical sources, it offers a biodegradable alternative to synthetic surfactants, with evidence from cosmetic safety reviews confirming its mild profile suitable for daily use across various product types.

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:

Emollient

Softens and smooths skin by filling in surface roughness and improving slip; can also help reduce moisture loss when paired with occlusives and film formers.

Surfactant

Lowers surface tension to enable cleansing, emulsifying, and foaming; central to shampoos, body washes, and many emulsions and micellar systems.

Emulsifying agent

Enables stable mixing of oil and water phases by forming an interfacial film, helping create lotions, creams, and cleansers with consistent texture.

Skin conditioning agent

Maintains skin softness, smoothness, and flexibility.

Benefits

Softens and smooths skin surface for improved texture.

Enables gentle cleansing by reducing surface tension mildly.

Stabilizes emulsions for consistent lotion and cream textures.

Who It's For

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

Who May Benefit	Who Should Avoid
People with dry skin needing added softness.	Individuals allergic to chicory or inulin.
Sensitive skin users seeking mild surfactants.	Anyone with reactions during patch testing.
Those preferring plant-based formula stabilizers.	Persons sensitive to fatty acid esters.

Safety Notes

Low hazard rating from safety databases.
Non-comedogenic, minimal pore-clogging risk.

Frequently Asked Questions about Stearoyl Inulin

What is Stearoyl Inulin made from?

It derives from chicory root inulin esterified with stearic acid, creating a natural sugar surfactant.

Is Stearoyl Inulin suitable for sensitive skin?

Yes, it shows low irritation potential in safety assessments, making it gentle for many skin types.

Does Stearoyl Inulin clog pores?

No, it has a comedogenic rating of 0, unlikely to contribute to pore blockage.