Ingredient review
Glycereth-7
INCI: Glycereth-7
A gentle, water-loving ingredient that helps your skin hold onto moisture without feeling greasy.
In plain English
Glycereth-7 is a modified form of glycerin that has been made more water-friendly by adding a small chain of ethylene oxide. This makes it spread easily on the skin, feel silky, and attract water from the environment or deeper layers of your skin to keep the surface hydrated. It is often used in rinse-off products like cleansers to prevent that tight, dry feeling after washing.
Review score
Safety, usefulness, and evidence
Strong fit for many routines
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
Quick decision guide
Easy yes for most routines
Glycereth-7 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 Glycereth-7.
- 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
Glycereth-7 is a semi-synthetic humectant created by reacting glycerin with about 7 units of ethylene oxide. This process makes it more soluble in water and gives it a lighter, less sticky feel than plain glycerin.
How it works
It works by drawing moisture from the air or deeper skin layers to the outer layer of your skin (the stratum corneum). Its larger molecular structure also helps it form a thin, non-occlusive film that temporarily reduces water loss, leaving skin feeling soft and smooth.
Pros
Lightweight hydration
Unlike plain glycerin, Glycereth-7 feels silky and non-sticky on the skin, making it ideal for daytime moisturizers and serums.
Gentle on skin
It has a very low irritation and comedogenic risk, so it's suitable for sensitive and acne-prone skin when used in properly formulated products.
Cons and cautions
Sustainability concerns
Glycereth-7 is often derived from palm oil, which raises environmental and ethical concerns unless sourced from certified sustainable suppliers.
Processing impurities
The ethoxylation process can leave trace amounts of 1,4-dioxane (a potential carcinogen) if not properly purified, though reputable manufacturers keep levels well below safety limits.
Best for
- People with normal to dry skin looking for lightweight hydration
- Anyone who dislikes the sticky feel of plain glycerin
Use caution if
- Those with known sensitivity to ethoxylated ingredients (rare)
Usage tips
Safety summary
Glycereth-7 is considered safe for use in cosmetics at typical concentrations. The main concern is the potential for trace 1,4-dioxane from ethoxylation, but reputable manufacturers purify the ingredient to meet safety standards. It is non-irritating and non-comedogenic for the vast majority of users.
Research notes
Research on ethoxylated glycerins like Glycereth-7 is limited but consistent with the safety profile of other polyol humectants. The Cosmetic Ingredient Review (CIR) has reviewed similar ingredients and found them safe. No specific clinical studies on Glycereth-7 alone were identified, but its function is well understood through its chemistry and use in formulations.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics globally, including by the FDA (as part of cosmetic ingredients) and the EU CosIng database. The Cosmetic Ingredient Review (CIR) panel has reviewed ethoxylated glycerins and found them safe as used.
- Common uses
- Cleansers, Moisturizers, Serums, Toners
- Environmental note
- Glycereth-7 is biodegradable, but its production from palm oil can contribute to deforestation unless certified sustainable palm oil is used.
Good to know
- Glycereth-7 is often used in sulfate-free cleansers to improve foam quality and reduce irritation.
- It is considered a 'green' alternative to some synthetic humectants because it starts from a natural glycerin base.
Common questions
What is Glycereth-7 in beauty products?
Glycereth-7 is a modified form of glycerin that has been made more water-friendly by adding a small chain of ethylene oxide. This makes it spread easily on the skin, feel silky, and attract water from the environment or deeper layers of your skin to keep the surface hydrated. It is often used in rinse-off products like cleansers to prevent that tight, dry feeling after washing.
What does Glycereth-7 do in a beauty product?
It works by drawing moisture from the air or deeper skin layers to the outer layer of your skin (the stratum corneum). Its larger molecular structure also helps it form a thin, non-occlusive film that temporarily reduces water loss, leaving skin feeling soft and smooth.
Is Glycereth-7 safe for most people?
Glycereth-7 is considered safe for use in cosmetics at typical concentrations. The main concern is the potential for trace 1,4-dioxane from ethoxylation, but reputable manufacturers purify the ingredient to meet safety standards. It is non-irritating and non-comedogenic for the vast majority of users.
Who should be careful with Glycereth-7?
Those with known sensitivity to ethoxylated ingredients (rare)
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.