Best For Skin Types
All, Dry, Sensitive, Mature
Addresses
Usage Frequency
Daily
What Is Glycerin/Oxybutylene Copolymer Stearyl Ether?
Glycerin/Oxybutylene Copolymer Stearyl Ether is a hybrid ingredient combining glycerin (a humectant) with a synthetic polymer and stearyl alcohol (a fatty alcohol). It functions primarily as an emollient, meaning it helps to soften and smooth the skin by creating a conditioning layer on the surface.
This combination structure allows the ingredient to both draw moisture into the skin and seal it in place, making it useful in formulations designed to support barrier function and skin comfort.
How It Works
The ingredient works through a dual mechanism. The glycerin component acts as a humectant, drawing water from the environment and deeper skin layers into the stratum corneum (the outermost layer). The synthetic polymer and stearyl alcohol work together to form a soft, occlusive film on the skin surface, which slows moisture loss.
This combination means the ingredient both hydrates and helps to seal hydration in, rather than relying on occlusion alone. This makes it gentler than heavy oils whilst still providing meaningful barrier support.
Clinical Evidence & References
Direct clinical evidence specifically on this ingredient combination is limited in published literature. However, both glycerin and stearyl alcohol have robust evidence supporting their use as conditioning and barrier-support ingredients in skincare.
The specific polymer structure may offer stability or performance advantages in formulation, but claims about superiority over simpler emollients would require dedicated research to substantiate.
How to Use
This ingredient is typically used as a base component in creams and moisturisers rather than a standalone treatment. It works well in combination with other hydrating and barrier-supporting ingredients like ceramides and plant oils. There is no need for rotation or cycling; it can be used continuously as part of a daily routine.
Safety & Precautions
Frequently Asked Questions
From the Clinic
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Glucosyl Ceramide
Composed of a ceramide and sugar molecule known as glucose Partially responsible for the healthy formation and appearance of skin’s upper layers
Glucosyl Hesperidin
Synthetic water-soluble form of the flavonoid hesperidin Has antioxidant properties + can improve barrier function
Glycereth-7 Triacetate
A synthetic humectant and emollient that confers hydration and a silky feel to skin
Glycerol Monostearate
Used as an emollient and thickening agent in cosmetics.
Glyceryl Behenate
Emollient formed by the combination of glycerin + behenic acid Aids the integration of key ingredients into skin’s surface and imparts a smooth, soft feel
Glyceryl Caprate
A gentle emollient derived from glycerin and capric acid that softens and conditions skin
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