Ingredient review
PEG-5 Trimyristyl Citrate
INCI: PEG-5 Trimyristyl Citrate
A gentle synthetic emulsifier that helps blend oil and water in creams and lotions, with a low risk of irritation.
In plain English
PEG-5 Trimyristyl Citrate is a man-made ingredient that helps oil and water mix together in skincare products. Think of it as a peacekeeper that stops your moisturizer from separating into a watery layer and an oily layer. It also has a mild skin-softening effect, making creams feel smooth and comfortable 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-5 Trimyristyl Citrate 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-5 Trimyristyl Citrate.
- 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 a short chain of ethylene glycol (PEG-5) to trimyristyl citrate, which itself is derived from citric acid and myristyl alcohol (a fatty alcohol from coconut or palm oil). It belongs to a class of ingredients called PEG esters.
How it works
It sits at the boundary between oil and water droplets, reducing surface tension so they can form a stable, uniform mixture (emulsion). This ensures your product stays creamy and doesn't separate. It also deposits a thin, non-greasy film on the skin, contributing to a soft, smooth feel.
Pros
Gentle on skin
PEG-5 Trimyristyl Citrate has a very low irritation and comedogenic rating, making it suitable even for sensitive skin types.
Improves product texture
It creates stable, elegant emulsions that feel silky and non-greasy, enhancing the user experience of creams and lotions.
Cons and cautions
Synthetic origin
As a PEG compound, it is fully synthetic. Some consumers prefer naturally derived emulsifiers for their skincare.
Potential trace impurities
PEG manufacturing can produce trace amounts of 1,4-dioxane, a potential carcinogen. However, reputable brands use purified grades that meet safety limits.
Best for
- Anyone using creams or lotions who wants a stable, smooth texture
- People with normal to dry skin looking for gentle emulsifiers
Use caution if
- Those who strictly avoid all synthetic or PEG-based ingredients
Usage tips
Safety summary
PEG-5 Trimyristyl Citrate is considered safe for use in cosmetics at typical concentrations. It has low skin irritation and sensitization potential. As with all PEGs, quality control is important to minimize trace impurities like 1,4-dioxane.
Research notes
Safety assessments of PEG esters by the Cosmetic Ingredient Review (CIR) panel have concluded they are safe for cosmetic use. No specific studies on PEG-5 Trimyristyl Citrate were found, but data on similar PEG compounds support its safety profile.
Common label clues
- Typical concentration
- Typically 0.5–5% in leave-on and rinse-off products
- Regulatory status
- Approved for use in cosmetics in the EU, US, and many other regions. The Cosmetic Ingredient Review (CIR) panel has evaluated similar PEG esters and found them safe as used.
- Common uses
- Moisturizers, Creams, Lotions, Cleansers
- Environmental note
- PEG compounds are generally biodegradable, but their production relies on petrochemicals. Some manufacturers are moving toward bio-based PEG alternatives.
Good to know
- PEG-5 Trimyristyl Citrate is often found in 'natural' or 'gentle' formulas because of its mildness
- It is biodegradable under standard wastewater treatment conditions
Common questions
What is PEG-5 Trimyristyl Citrate in beauty products?
PEG-5 Trimyristyl Citrate is a man-made ingredient that helps oil and water mix together in skincare products. Think of it as a peacekeeper that stops your moisturizer from separating into a watery layer and an oily layer. It also has a mild skin-softening effect, making creams feel smooth and comfortable on the skin.
What does PEG-5 Trimyristyl Citrate do in a beauty product?
It sits at the boundary between oil and water droplets, reducing surface tension so they can form a stable, uniform mixture (emulsion). This ensures your product stays creamy and doesn't separate. It also deposits a thin, non-greasy film on the skin, contributing to a soft, smooth feel.
Is PEG-5 Trimyristyl Citrate safe for most people?
PEG-5 Trimyristyl Citrate is considered safe for use in cosmetics at typical concentrations. It has low skin irritation and sensitization potential. As with all PEGs, quality control is important to minimize trace impurities like 1,4-dioxane.
Who should be careful with PEG-5 Trimyristyl Citrate?
Those who strictly avoid all synthetic or PEG-based ingredients
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.