Best For Skin Types
All, Dry, Combination
Addresses
Usage Frequency
Daily
What Is PEG-12?
PEG-12 is a polyethylene glycol—a synthetic polymer derived from petroleum. In skincare, it functions as both a humectant (drawing moisture into the skin) and a solvent (helping to dissolve and blend other ingredients). It's a smaller molecular weight PEG, making it lighter than some of its counterparts.
You'll find PEG-12 in a relatively small proportion of skincare products, where it typically works behind the scenes to improve texture, stability and ingredient delivery rather than as a standalone active.
How It Works
As a humectant, PEG-12 has a hygroscopic quality—it attracts water molecules and helps bind them to the skin. This can improve hydration without leaving a heavy or occlusive layer. Its solvent properties also allow it to dissolve both water-soluble and oil-soluble ingredients, helping formulations achieve a cohesive texture and allowing active ingredients to be dispersed evenly.
Clinical Evidence & References
Research into PEG-12 dimethicone (a common variant) suggests it can be incorporated into nanostructured delivery systems for topical use, potentially improving how formulations interact with skin. Studies have also examined its use in hair care, where it appears to help protect and condition treated fibres.
Evidence specifically on PEG-12's humectant efficacy in skincare is limited in published literature. It is generally recognised as safe in cosmetic formulations and is well-tolerated across skin types, but more targeted research on its standalone hydrating benefit would strengthen our understanding.
Published Research
How to Use
PEG-12 is typically used at low concentrations as a supporting ingredient rather than the main active, so there's no need for special application technique. Use it as part of your regular routine according to the product's instructions. It pairs well with other humectants like glycerin or hyaluronic acid, where the combination may enhance overall hydration.
Safety & Precautions
Frequently Asked Questions
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PEG-12 is a variant of PEG-75, the form you will most often see on an ingredients list.
Functions as a humectant to boost skin’s hydration | May also be used as a solvent to mesh ingredients cohesively and enhance formulary texture
Related Ingredients
PEG-75
Functions as a humectant to boost skin’s hydration | May also be used as a solvent to mesh ingredients cohesively and enhance formulary texture
PEG-4
Type of polyethylene glycol | Used as a humectant and solvent in cosmetics
PEG-14
Functions as a humectant to increase skin’s hydration | May also be used as a solvent to mesh ingredients cohesively
PEG-6
A lightweight humectant and solvent that helps formulations absorb and deliver other actives
PEG-20
A versatile polymer that helps formulations blend and retain moisture
PEG-7m
A synthetic polymer that stabilises formulations and controls texture
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