Ingredient review

PEG-5 Glyceryl Stearate

INCI: PEG-5 Glyceryl Stearate

A gentle emulsifier that helps create stable, creamy textures without heavy irritation or clogging.

beautyskincareemulsifier

In plain English

PEG-5 Glyceryl Stearate is a semi-synthetic ingredient made from glycerin and stearic acid (a fatty acid from plant or animal sources). It acts like a bridge between oil and water, allowing them to mix into a smooth, stable cream or lotion. Because it's mild and non-irritating, it's often used in gentle skincare products for sensitive skin.

Review score

Safety, usefulness, and evidence

3.8Good

3.8/ 5

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: semi synthetic
Evidence: moderate
Irritation: low
Clogging risk: low

How reviews are scored

Quick decision guide

Useful, but context matters

PEG-5 Glyceryl Stearate 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 Glyceryl Stearate.
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

low

Less likely to sting, burn, or bother most users, though sensitive skin can still react.

Clogging risk

low

Less likely to feel heavy or contribute to clogged pores for most skin types.

Evidence level

moderate

There is useful support, but formula details and claim strength still matter.

What it is

PEG-5 Glyceryl Stearate is a polyethylene glycol (PEG) derivative of glyceryl stearate, a common emulsifier. The 'PEG-5' indicates it has about 5 ethylene oxide units, which makes it water-friendly while still holding onto oil. It is produced through a controlled chemical process and is considered a semi-synthetic ingredient.

How it works

In a skincare product, PEG-5 Glyceryl Stearate sits at the boundary between oil and water droplets. Its water-loving (hydrophilic) end dissolves in water, and its oil-loving (lipophilic) end dissolves in oil. This stabilizes the mixture, preventing the product from separating into layers. It also leaves a light, non-greasy feel on the skin.

Pros

Gentle on skin

PEG-5 Glyceryl Stearate has a low irritation risk, making it suitable for sensitive skin types and daily use.

Stable emulsions

It helps prevent creams and lotions from separating, so your product stays consistent and effective over time.

Cons and cautions

Semi-synthetic origin

It is not a natural ingredient, which may be a drawback for those seeking fully plant-based or 'clean' beauty products.

Potential contamination concerns

PEG compounds can contain trace impurities like ethylene oxide if not properly purified, though reputable brands ensure high-quality sourcing.

Best for

People with normal to dry skin looking for a gentle moisturizer
Those with sensitive skin who tolerate mild emulsifiers well

Use caution if

Individuals with known allergies to PEG compounds (very rare)
Those seeking 100% natural or plant-based formulations (it is semi-synthetic)

Usage tips

Look for products that list PEG-5 Glyceryl Stearate near the middle of the ingredient list for typical emulsifying concentrations.

Store creams containing this ingredient in a cool, dry place to maintain emulsion stability.

Safety summary

PEG-5 Glyceryl Stearate is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential. As with all PEG compounds, quality control during manufacturing is important to avoid impurities, but reputable brands follow strict purification standards.

Research notes

The Cosmetic Ingredient Review (CIR) panel has evaluated PEG glyceryl stearates and concluded they are safe in cosmetic formulations. Studies show low acute toxicity and minimal skin irritation. No significant evidence links this ingredient to long-term health concerns when used as directed.

Common label clues

Typical concentration: 1–5%
Regulatory status: Approved for use in cosmetics by the U.S. FDA and the European Commission. The Cosmetic Ingredient Review (CIR) panel has reviewed PEG glyceryl stearates and found them safe as used.
Common uses: Moisturizers, Creams, Lotions, Cleansers
Environmental note: PEG-5 Glyceryl Stearate is biodegradable under standard conditions, but its production may involve palm oil, which can raise sustainability concerns if not sourced responsibly.

Good to know

PEG-5 Glyceryl Stearate is often used alongside other emulsifiers to create a balanced formula.
It is considered safe by major regulatory bodies when used in cosmetics at typical levels.

Common questions

What is PEG-5 Glyceryl Stearate in beauty products?

What does PEG-5 Glyceryl Stearate do in a beauty product?

Is PEG-5 Glyceryl Stearate safe for most people?

Who should be careful with PEG-5 Glyceryl Stearate?

Individuals with known allergies to PEG compounds (very rare) Those seeking 100% natural or plant-based formulations (it is semi-synthetic)

Research sources

Cosmetic Ingredient Review (CIR) – Safety Assessment of PEG Glyceryl StearatesOpen European Commission – CosIng DatabaseOpen U.S. FDA – Cosmetics IngredientsOpen

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.