Ingredient review
PEG-12 Glyceryl Dimyristate
INCI: PEG-12 Glyceryl Dimyristate
A reliable synthetic emulsifier that helps create stable, creamy formulas, but its PEG component raises minor purity concerns for sensitive skin.
In plain English
PEG-12 Glyceryl Dimyristate is a man-made ingredient that helps oil and water mix together in skincare products. Think of it as a peacekeeper that stops your lotion from separating into watery and oily layers. The 'PEG' part is a chain of ethylene glycol units that makes the ingredient water-friendly, while the 'glyceryl dimyristate' part is derived from fatty acids and helps it blend with oils. It also leaves a light, non-greasy feel on the skin.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
PEG-12 Glyceryl Dimyristate is generally a lower-concern ingredient when the full formula suits your skin.
Plain-English read
Treat this as a practical screening step before you compare products that contain this ingredient.
- Step 1Start with the score, then check the irritation and clogging risk before judging PEG-12 Glyceryl Dimyristate.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.
Score terms in plain English
Irritation risk
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
A synthetic compound made by attaching 12 units of polyethylene glycol (PEG) to glyceryl dimyristate, which is a glycerin ester of myristic acid (a fatty acid found in coconut oil and other fats).
How it works
In a formula, the PEG chain attracts water while the fatty portion attracts oil. This dual nature allows it to sit at the boundary between oil and water droplets, reducing surface tension and keeping the mixture stable. It also deposits a thin film on the skin, which can improve texture and reduce water loss.
Pros
Effective emulsifier
Creates stable oil-in-water emulsions that keep products from separating, ensuring consistent texture and performance.
Light skin feel
Leaves a smooth, non-sticky finish on the skin, making it ideal for daytime moisturizers and lightweight lotions.
Cons and cautions
PEG purity concerns
During manufacturing, PEG compounds can be contaminated with ethylene oxide or 1,4-dioxane, though reputable brands purify them to safe levels.
Not natural
Fully synthetic, which may be a drawback for consumers seeking plant-based or naturally derived ingredients.
Best for
- Anyone using lotions or creams who wants a stable, non-greasy formula
- People with normal to combination skin looking for lightweight moisturizers
Use caution if
- Those with known sensitivities to PEG compounds or who prefer completely natural formulations
Usage tips
Safety summary
PEG-12 Glyceryl Dimyristate is considered safe for cosmetic use at typical concentrations. The main concern is potential contamination with ethylene oxide or 1,4-dioxane during production, but reputable suppliers purify the ingredient to meet safety standards. Skin irritation and allergy are rare.
Research notes
Safety assessments by the Cosmetic Ingredient Review (CIR) panel have concluded that PEG compounds are safe when formulated to meet purity specifications. No specific studies on PEG-12 Glyceryl Dimyristate alone were found, but its chemical class is well-studied and considered low risk.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics by the FDA and EU CosIng database. Manufacturers are expected to follow purity guidelines to minimize residual ethylene oxide and 1,4-dioxane.
- Common uses
- Moisturizers, Cleansers, Serums, Sunscreens
- Environmental note
- PEG compounds are not readily biodegradable and may persist in aquatic environments. However, they are used in low concentrations and are generally considered low risk in rinse-off products.
Good to know
- The number '12' in PEG-12 indicates the average length of the PEG chain, which affects its water solubility.
- This ingredient is often used in conjunction with other emulsifiers to fine-tune texture.
Common questions
What is PEG-12 Glyceryl Dimyristate in beauty products?
PEG-12 Glyceryl Dimyristate is a man-made ingredient that helps oil and water mix together in skincare products. Think of it as a peacekeeper that stops your lotion from separating into watery and oily layers. The 'PEG' part is a chain of ethylene glycol units that makes the ingredient water-friendly, while the 'glyceryl dimyristate' part is derived from fatty acids and helps it blend with oils. It also leaves a light, non-greasy feel on the skin.
What does PEG-12 Glyceryl Dimyristate do in a beauty product?
In a formula, the PEG chain attracts water while the fatty portion attracts oil. This dual nature allows it to sit at the boundary between oil and water droplets, reducing surface tension and keeping the mixture stable. It also deposits a thin film on the skin, which can improve texture and reduce water loss.
Is PEG-12 Glyceryl Dimyristate safe for most people?
PEG-12 Glyceryl Dimyristate is considered safe for cosmetic use at typical concentrations. The main concern is potential contamination with ethylene oxide or 1,4-dioxane during production, but reputable suppliers purify the ingredient to meet safety standards. Skin irritation and allergy are rare.
Who should be careful with PEG-12 Glyceryl Dimyristate?
Those with known sensitivities to PEG compounds or who prefer completely natural formulations
Research sources
Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.