Ingredient review

PEG-78 Glyceryl Cocoate

INCI: PEG-78 Glyceryl Cocoate

A gentle, coconut-derived cleansing ingredient that helps lift dirt and oil without stripping the skin.

beautyskincarecleansing agent

In plain English

PEG-78 Glyceryl Cocoate is a mild cleansing agent made by combining coconut oil with polyethylene glycol (PEG). It helps water mix with oil and dirt so they can be rinsed away easily. Because it is gentle, it is often used in products for sensitive or dry skin. The 'PEG' part means it has been processed to be water-soluble, making it less likely to leave a greasy residue.

Review score

Safety, usefulness, and evidence

4.0Good

4.0/ 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-78 Glyceryl Cocoate 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-78 Glyceryl Cocoate.
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

A semi-synthetic surfactant and emulsifier created by reacting coconut oil with polyethylene glycol. It belongs to the family of PEGylated glyceryl esters, known for their mildness and ability to create stable emulsions.

How it works

It reduces the surface tension between water and oil, allowing them to mix. This helps lift sebum, makeup, and impurities from the skin so they can be rinsed away. Its large PEG chain (78 units) makes it very water-soluble, which contributes to its gentle cleansing action.

Pros

Very gentle on skin

Unlike harsher sulfates, PEG-78 Glyceryl Cocoate cleanses without disrupting the skin's moisture barrier, making it ideal for daily use on sensitive or dry skin.

Coconut-derived and mild

Its starting material is coconut oil, a renewable resource, and the finished ingredient is known for being non-irritating even in leave-on products.

Cons and cautions

Potential processing impurities

During manufacturing, trace amounts of ethylene oxide or 1,4-dioxane can form. Reputable brands use purified grades to keep these levels extremely low, but it's something to be aware of.

Not fully biodegradable

The long PEG chain can persist in the environment longer than simpler surfactants, though it is still considered safer than many alternatives.

Best for

People with dry or sensitive skin looking for a gentle cleanser
Anyone who prefers mild, non-stripping surfactants in their daily routine

Use caution if

Those with a known allergy to coconut-derived ingredients (rare)

Usage tips

Look for products that list this ingredient near the middle of the INCI for a balanced cleansing experience.

Pair with a moisturizer after cleansing to maintain hydration, especially if you have dry skin.

Safety summary

Considered safe for use in cosmetics at typical concentrations. The main concern is potential contamination with ethylene oxide or 1,4-dioxane, but purified grades used by reputable manufacturers keep these impurities within safe limits. It is non-irritating and non-comedogenic for most skin types.

Research notes

The Cosmetic Ingredient Review (CIR) has evaluated PEG compounds and concluded they are safe for use in cosmetics. Studies show that PEGylated glyceryl esters are mild surfactants with low irritation potential. No recent specific studies on PEG-78 Glyceryl Cocoate were found, but it is chemically similar to other well-studied PEG glyceryl esters.

Common label clues

Typical concentration: 1% to 10%
Regulatory status: Approved for use in cosmetics by the FDA and the European Commission. The Cosmetic Ingredient Review (CIR) panel has reviewed PEG compounds and found them safe when formulated to be non-irritating.
Common uses: Cleansers, Shampoos, Body washes, Facial washes
Environmental note: Derived from coconut oil, a renewable resource, but the PEG chain may reduce biodegradability compared to simpler plant-based surfactants.

Good to know

The number '78' refers to the average number of ethylene oxide units in the PEG chain, which influences its water solubility and mildness.
This ingredient is often used in 'sulfate-free' formulations as a primary or secondary surfactant.

Common questions

What is PEG-78 Glyceryl Cocoate in beauty products?

What does PEG-78 Glyceryl Cocoate do in a beauty product?

Is PEG-78 Glyceryl Cocoate safe for most people?

Who should be careful with PEG-78 Glyceryl Cocoate?

Those with a known allergy to coconut-derived ingredients (rare)

Research sources

Cosmetic Ingredient Review (CIR) – Safety Assessment of PEGsOpen European Commission CosIng Database – PEG-78 Glyceryl CocoateOpen PubMed – Mild Surfactants and Skin BarrierOpen

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.