Ingredient review
PEG-8 Myristate
INCI: PEG-8 Myristate
PEG-8 Myristate is a safe, synthetic emollient that helps products feel smooth and spread easily, but it may be less ideal for those avoiding ethoxylated ingredients.
In plain English
PEG-8 Myristate is a man-made ingredient that helps lotions and creams feel silky and spread evenly on your skin. It's made by combining a fatty acid from plant oils with polyethylene glycol (PEG), a common ingredient in many personal care products. It works as an emollient, meaning it softens and smooths the skin's surface, and as an emulsifier, helping water and oil mix together so your product stays stable and doesn't separate. While generally considered safe, some people prefer to avoid PEG compounds due to concerns about potential contamination during manufacturing, though reputable brands use purified versions.
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-8 Myristate 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-8 Myristate.
- 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
PEG-8 Myristate is a synthetic ester created by reacting myristic acid (a fatty acid found in coconut oil and palm oil) with PEG-8 (a type of polyethylene glycol). It appears as a waxy solid or liquid and is used to improve the feel and performance of cosmetic products.
How it works
In a cosmetic product, PEG-8 Myristate sits on the skin's surface, forming a thin, non-greasy film that reduces water loss and makes the skin feel softer. As an emulsifier, it helps blend oil and water phases, creating a smooth, stable cream or lotion that doesn't separate over time.
Pros
Smooth texture
PEG-8 Myristate gives creams and lotions a silky, non-greasy feel, making them pleasant to apply and quick to absorb.
Stable formulations
As an emulsifier, it helps keep oil and water mixed, preventing your product from separating and ensuring consistent performance.
Cons and cautions
Ethoxylation concerns
The manufacturing process can create trace amounts of 1,4-dioxane, a potential carcinogen, though reputable brands purify their ingredients to safe levels.
Sustainability issues
Myristic acid is often sourced from palm oil, which can be linked to deforestation and habitat loss unless certified sustainable.
Best for
- People with normal to dry skin looking for a lightweight moisturizer
- Anyone who wants a smooth, non-sticky feel from their skincare products
Use caution if
- Those who prefer to avoid ethoxylated ingredients or have concerns about 1,4-dioxane contamination
Usage tips
Safety summary
PEG-8 Myristate is generally recognized as safe for use in cosmetics. The main concern is potential contamination with 1,4-dioxane during manufacturing, but purified grades used in reputable products contain only trace amounts well below safety limits. It has low irritation and comedogenic potential.
Research notes
The Cosmetic Ingredient Review (CIR) panel has evaluated PEG-8 Myristate and concluded it is safe for use in cosmetics. Studies show it has low acute toxicity and is not a significant skin irritant or sensitizer. Research on 1,4-dioxane contamination is ongoing, but regulatory limits are in place to ensure consumer safety.
Common label clues
- Typical concentration
- 1% to 10%
- Regulatory status
- Approved for use in cosmetics in the US, EU, and many other regions. The CIR has deemed it safe as used in rinse-off and leave-on products.
- Common uses
- Moisturizers, Cleansers, Makeup, Sunscreens
- Environmental note
- The myristic acid component may be derived from palm oil; choosing products with RSPO-certified palm oil can reduce environmental impact.
Good to know
- PEG-8 Myristate is considered safe by the Cosmetic Ingredient Review (CIR) panel at concentrations up to 25%.
- It is often used in combination with other emollients to achieve a specific texture or feel.
Common questions
What is PEG-8 Myristate in beauty products?
PEG-8 Myristate is a man-made ingredient that helps lotions and creams feel silky and spread evenly on your skin. It's made by combining a fatty acid from plant oils with polyethylene glycol (PEG), a common ingredient in many personal care products. It works as an emollient, meaning it softens and smooths the skin's surface, and as an emulsifier, helping water and oil mix together so your product stays stable and doesn't separate. While generally considered safe, some people prefer to avoid PEG compounds due to concerns about potential contamination during manufacturing, though reputable brands use purified versions.
What does PEG-8 Myristate do in a beauty product?
In a cosmetic product, PEG-8 Myristate sits on the skin's surface, forming a thin, non-greasy film that reduces water loss and makes the skin feel softer. As an emulsifier, it helps blend oil and water phases, creating a smooth, stable cream or lotion that doesn't separate over time.
Is PEG-8 Myristate safe for most people?
PEG-8 Myristate is generally recognized as safe for use in cosmetics. The main concern is potential contamination with 1,4-dioxane during manufacturing, but purified grades used in reputable products contain only trace amounts well below safety limits. It has low irritation and comedogenic potential.
Who should be careful with PEG-8 Myristate?
Those who prefer to avoid ethoxylated ingredients or have concerns about 1,4-dioxane contamination
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.