Ingredient review
Undecyl Glucoside
INCI: Undecyl Glucoside
A gentle, biodegradable surfactant that cleanses without stripping the skin, ideal for sensitive or dry skin types.
In plain English
Undecyl glucoside is a mild cleansing ingredient made from glucose (a sugar) and undecyl alcohol (derived from plant oils). It works by helping water mix with oil and dirt so they can be rinsed away. Unlike harsher detergents, it cleans without stripping your skin's natural moisture barrier, making it a favorite in gentle and baby-friendly products.
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
- natural
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Easy yes for most routines
Undecyl Glucoside 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 Undecyl Glucoside.
- 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
Undecyl glucoside is a non-ionic surfactant belonging to the alkyl polyglucoside family. It is synthesized from renewable raw materials—typically glucose from corn or wheat and fatty alcohols from coconut or palm oil. It appears as a clear to slightly yellow liquid and is known for its excellent foaming and emulsifying properties.
How it works
As a surfactant, undecyl glucoside reduces the surface tension between water and oils, allowing them to mix. When you wash your face or body, it surrounds dirt and excess oil, forming tiny droplets that can be easily rinsed away. Because it is non-ionic, it is less likely to irritate the skin compared to ionic surfactants like sodium lauryl sulfate.
Pros
Very gentle on skin
Undecyl glucoside is one of the mildest surfactants available, making it suitable for daily use even on sensitive or eczema-prone skin.
Environmentally friendly
It is made from renewable plant sources and is readily biodegradable, reducing its impact on aquatic ecosystems.
Cons and cautions
Can be drying at high levels
In some rinse-off products with very high surfactant concentrations, it may still cause slight dryness for very dry skin types.
Less effective in hard water
Like many glucosides, its foaming and cleansing performance can be reduced in hard water, requiring formulation adjustments.
Best for
- People with dry or sensitive skin
- Those looking for eco-friendly, plant-based cleansers
- Parents seeking gentle baby washes or shampoos
Use caution if
- Individuals with known allergies to glucose-derived ingredients (extremely rare)
Usage tips
Safety summary
Undecyl glucoside is considered very safe for cosmetic use. It has low irritation and sensitization potential, and no significant health concerns have been identified in standard safety assessments. It is non-comedogenic and suitable for most skin types.
Research notes
Studies on alkyl polyglucosides, including undecyl glucoside, show they are mild to the skin and eyes, with low acute toxicity. They are well-tolerated in repeated-use tests. Most evidence comes from ingredient safety reviews and formulation studies rather than large clinical trials.
Common label clues
- Typical concentration
- 1–15% in rinse-off products; lower in leave-on formulas
- Regulatory status
- Approved for use in cosmetics in the EU, US, and other major markets. No concentration restrictions for rinse-off products; leave-on products typically use lower levels.
- Common uses
- Facial cleansers, Body washes, Shampoos, Baby products
- Environmental note
- Derived from renewable plant sources (glucose and fatty alcohols) and is readily biodegradable, making it a more sustainable choice compared to petroleum-based surfactants.
Good to know
- Undecyl glucoside is often combined with other mild surfactants to improve foam and cleansing power.
- It is considered safe for use in products for babies and children.
Common questions
What is Undecyl Glucoside in beauty products?
Undecyl glucoside is a mild cleansing ingredient made from glucose (a sugar) and undecyl alcohol (derived from plant oils). It works by helping water mix with oil and dirt so they can be rinsed away. Unlike harsher detergents, it cleans without stripping your skin's natural moisture barrier, making it a favorite in gentle and baby-friendly products.
What does Undecyl Glucoside do in a beauty product?
As a surfactant, undecyl glucoside reduces the surface tension between water and oils, allowing them to mix. When you wash your face or body, it surrounds dirt and excess oil, forming tiny droplets that can be easily rinsed away. Because it is non-ionic, it is less likely to irritate the skin compared to ionic surfactants like sodium lauryl sulfate.
Is Undecyl Glucoside safe for most people?
Undecyl glucoside is considered very safe for cosmetic use. It has low irritation and sensitization potential, and no significant health concerns have been identified in standard safety assessments. It is non-comedogenic and suitable for most skin types.
Who should be careful with Undecyl Glucoside?
Individuals with known allergies to glucose-derived ingredients (extremely 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.