Isostearyl Glycolate

What is Isostearyl Glycolate?

Isostearyl Glycolate is a synthetic ester produced by reacting isostearyl alcohol—a branched, long-chain fatty alcohol often sourced from vegetable oils—with glycolic acid, the smallest alpha-hydroxy acid. It falls into the emollients and conditioning agents category in cosmetics, commonly found in lipsticks, creams, and serums. This ingredient works by forming a thin, flexible film on the skin that mimics natural lipids, reducing surface friction for a silky texture. In formulations, it dissolves lipophilic actives, adjusts thickness for easy spreading, and strengthens solid structures against breakage. Its branched structure provides lightweight slip without greasiness, making it ideal for oil-free or matte finishes while supporting overall product integrity and active delivery.

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:

Binder

Helps hold solid ingredients together to form cohesive tablets, compacts, or sticks, improving pressability, integrity, and wear of the finished product.

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.

Solvent

Dissolves and carries other ingredients, helping control viscosity, evaporation rate, and delivery of actives in both water- and oil-based systems.

Skin conditioning agent

Maintains skin softness, smoothness, and flexibility.

Benefits

Provides lightweight softening to improve skin smoothness and flexibility.

Enhances product spreadability and stability in creams, sticks, and serums.

Facilitates even distribution of other ingredients 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 with normal to dry skin seeking non-greasy texture enhancers.	People with known sensitivity to alpha-hydroxy acid derivatives.
Users of solid cosmetics like lip products for better wear and integrity.	Individuals experiencing irritation from fatty alcohol esters.
Those preferring low-comedogenic options for clearer pore appearance.	Those preferring fully natural or botanical-only skincare routines.

Safety Notes

Considered safe for use in cosmetics at typical concentrations by regulatory reviews.
Low potential for comedogenicity, suitable for acne-prone skin.

Frequently Asked Questions about Isostearyl Glycolate

What does Isostearyl Glycolate do in skincare?

It acts as an emollient to soften skin, a binder for product structure, and a solvent for even ingredient delivery.

Is Isostearyl Glycolate safe for daily use?

Yes, it is generally regarded as safe in cosmetics with low hazard ratings and no major concerns.

Will it clog my pores?

No, it has a comedogenic rating of 0, making it suitable for most skin types.