Ingredient review
Glycereth-26 Phosphate
INCI: GLYCERETH-26 PHOSPHATE
A gentle, water-attracting ingredient that helps hydrate the skin without feeling heavy or sticky.
In plain English
Glycereth-26 Phosphate is a modified form of glycerin, a common moisturizing ingredient. The modification makes it more water-soluble and less sticky, so it can draw moisture into the skin and help keep it there without leaving a tacky feel. It's often used in lightweight hydrating products like serums and gels.
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
- semi synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Glycereth-26 Phosphate 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 Phosphate.
- 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 Phosphate is a semi-synthetic compound created by reacting glycerin with ethylene oxide and then adding a phosphate group. This process results in a larger molecule that is still water-soluble but has improved skin feel and compatibility with other ingredients.
How it works
As a humectant, it attracts water from the environment and deeper layers of the skin to the outer layer, helping to maintain hydration. The phosphate group may also help it bind to the skin's surface, prolonging its moisturizing effect.
Pros
Lightweight hydration
Unlike plain glycerin, Glycereth-26 Phosphate feels less tacky on the skin, making it ideal for daytime use or for those who dislike heavy textures.
Low irritation potential
It has a low irritation and comedogenic rating, so it's generally safe for sensitive and acne-prone skin types.
Cons and cautions
Limited independent research
Most safety data comes from industry sources or general glycerin studies, so long-term independent research is sparse.
Humidity-dependent efficacy
Like all humectants, it works best in moderate to high humidity; in dry air, it may draw moisture from deeper skin layers instead of the environment.
Best for
- People with normal to oily skin looking for lightweight hydration
- Those who find glycerin too sticky or heavy
Use caution if
- Individuals with known sensitivity to ethylene oxide derivatives (rare)
Usage tips
Safety summary
Glycereth-26 Phosphate is considered safe for topical use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, making it suitable for most skin types. However, as with any ingredient, patch testing is recommended for those with very sensitive skin.
Research notes
Research on Glycereth-26 Phosphate specifically is limited, but it is closely related to glycerin and other glycereth compounds, which have a long history of safe use. The Cosmetic Ingredient Review (CIR) has evaluated similar ingredients and found them safe.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the US, EU, and many other regions. The Cosmetic Ingredient Review (CIR) panel has reviewed related glycereth compounds and found them safe as used.
- Common uses
- Moisturizers, Serums, Cleansers, Toners
- Environmental note
- As a semi-synthetic compound, its production involves petrochemical-derived ethylene oxide, but it is biodegradable and not known to bioaccumulate.
Good to know
- Glycereth-26 Phosphate is often used in 'water-light' formulations and can help improve the spreadability of other ingredients.
- It is considered safe by the Cosmetic Ingredient Review (CIR) panel at typical use levels.
Common questions
What is Glycereth-26 Phosphate in beauty products?
Glycereth-26 Phosphate is a modified form of glycerin, a common moisturizing ingredient. The modification makes it more water-soluble and less sticky, so it can draw moisture into the skin and help keep it there without leaving a tacky feel. It's often used in lightweight hydrating products like serums and gels.
What does Glycereth-26 Phosphate do in a beauty product?
As a humectant, it attracts water from the environment and deeper layers of the skin to the outer layer, helping to maintain hydration. The phosphate group may also help it bind to the skin's surface, prolonging its moisturizing effect.
Is Glycereth-26 Phosphate safe for most people?
Glycereth-26 Phosphate is considered safe for topical use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, making it suitable for most skin types. However, as with any ingredient, patch testing is recommended for those with very sensitive skin.
Who should be careful with Glycereth-26 Phosphate?
Individuals with known sensitivity to ethylene oxide derivatives (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.