Ingredient review
Glycereth-26
INCI: Glycereth-26
A gentle, water-loving humectant that hydrates without stickiness, ideal for sensitive and dry skin types.
In plain English
Glycereth-26 is a modified version of glycerin that has been made more water-friendly through a process called ethoxylation. This means it spreads easily in water-based formulas and feels lighter on the skin than plain glycerin. It works by pulling moisture from the air or deeper layers of the skin into the outer layer, helping to keep your skin soft and hydrated without a heavy or sticky feel.
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-26 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-26.
- 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-26 is a semi-synthetic humectant created by reacting glycerin with ethylene oxide. It belongs to the PEG (polyethylene glycol) family and is widely used in cosmetics for its excellent water solubility and mildness.
How it works
Glycereth-26 attracts water molecules from the environment and binds them to the skin's surface, increasing hydration. It also forms a thin, non-occlusive film that helps reduce water loss (transepidermal water loss, or TEWL) without clogging pores.
Pros
Lightweight hydration
Unlike plain glycerin, Glycereth-26 feels less sticky and spreads easily, making it ideal for gel-based serums and lightweight moisturizers.
Gentle on skin
It has a low irritation and comedogenic risk, so it's suitable for sensitive and acne-prone skin types without clogging pores.
Cons and cautions
Ethoxylation concerns
The production process uses ethylene oxide, which can leave trace impurities like 1,4-dioxane if not properly purified. Reputable brands ensure purification to safe levels.
Limited humectant power
While effective, Glycereth-26 is not as potent a humectant as hyaluronic acid or glycerin at higher concentrations, so it's often used in blends.
Best for
- People with dry or dehydrated skin
- Those with sensitive or reactive skin
- Anyone looking for a lightweight humectant in serums or moisturizers
Use caution if
- Individuals with known allergies to PEG compounds (rare)
Usage tips
Safety summary
Glycereth-26 is considered safe for cosmetic use with low irritation and comedogenic potential. Trace impurities from ethoxylation are controlled by quality manufacturing. It is well-tolerated by most skin types.
Research notes
Studies confirm Glycereth-26's effectiveness as a humectant and skin conditioner. The Cosmetic Ingredient Review (CIR) panel has deemed it safe for use in rinse-off and leave-on products at typical concentrations.
Common label clues
- Typical concentration
- 1% to 10%
- Regulatory status
- Approved for use in cosmetics worldwide, including the EU and US, with concentration limits typically under 50%.
- Common uses
- Serums, Moisturizers, Cleansers, Toners
- Environmental note
- As a PEG compound, Glycereth-26 may have moderate biodegradability. Some consumers prefer plant-derived alternatives like glycerin for lower environmental impact.
Good to know
- Glycereth-26 is often used in 'water-light' formulas because it doesn't leave a tacky residue.
- It is considered safe by the Cosmetic Ingredient Review (CIR) panel at concentrations up to 50%.
Common questions
What is Glycereth-26 in beauty products?
Glycereth-26 is a modified version of glycerin that has been made more water-friendly through a process called ethoxylation. This means it spreads easily in water-based formulas and feels lighter on the skin than plain glycerin. It works by pulling moisture from the air or deeper layers of the skin into the outer layer, helping to keep your skin soft and hydrated without a heavy or sticky feel.
What does Glycereth-26 do in a beauty product?
Glycereth-26 attracts water molecules from the environment and binds them to the skin's surface, increasing hydration. It also forms a thin, non-occlusive film that helps reduce water loss (transepidermal water loss, or TEWL) without clogging pores.
Is Glycereth-26 safe for most people?
Glycereth-26 is considered safe for cosmetic use with low irritation and comedogenic potential. Trace impurities from ethoxylation are controlled by quality manufacturing. It is well-tolerated by most skin types.
Who should be careful with Glycereth-26?
Individuals with known allergies to PEG compounds (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.