Ingredient review
Polyglyceryl-10 Stearate
INCI: Polyglyceryl-10 Stearate
A mild, non-irritating emulsifier ideal for sensitive skin and clean beauty formulations.
In plain English
Polyglyceryl-10 Stearate is a gentle emulsifier made from plant-derived glycerin and stearic acid (a fatty acid found in coconut or palm oil). Its job is to help water and oil mix together so your lotion or cream stays smooth and doesn't separate. Because it's very mild and non-irritating, it's a favorite in products for sensitive skin and in 'clean beauty' lines.
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
Polyglyceryl-10 Stearate 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 Polyglyceryl-10 Stearate.
- 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
A non-ionic emulsifier created by reacting polyglycerin (derived from glycerin) with stearic acid (a fatty acid from plant oils). It belongs to the polyglyceryl ester family, known for being exceptionally gentle on skin.
How it works
It has a water-loving head (polyglycerin) and an oil-loving tail (stearate). When mixed, it positions itself at the boundary between oil and water droplets, reducing surface tension so they blend into a stable, creamy emulsion. This prevents your product from separating into watery and oily layers.
Pros
Ultra-gentle on skin
Rated very low on irritation scales, making it safe for daily use even on compromised skin barriers.
Eco-friendly profile
Derived from renewable plant sources and readily biodegradable, aligning with sustainable formulation goals.
Cons and cautions
Higher cost
Compared to synthetic emulsifiers like PEG derivatives, polyglyceryl esters can be more expensive, which may reflect in product pricing.
Requires careful formulation
It may need to be paired with co-emulsifiers or stabilizers to achieve the desired texture in some products.
Best for
- People with sensitive, eczema-prone, or easily irritated skin
- Anyone looking for a 'clean beauty' or plant-derived ingredient in their skincare
Use caution if
- Those with a known allergy to stearic acid or polyglycerin (extremely rare)
Usage tips
Safety summary
Polyglyceryl-10 Stearate is considered very safe for cosmetic use. It has a low irritation and comedogenic rating, making it suitable for sensitive and acne-prone skin. No significant safety concerns have been reported in clinical or regulatory reviews.
Research notes
Research on polyglyceryl esters, including Polyglyceryl-10 Stearate, indicates they are mild, non-irritating emulsifiers. Studies show they do not disrupt the skin barrier and are well-tolerated even in high concentrations. Their safety is supported by the Cosmetic Ingredient Review (CIR) panel.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics globally, including by the EU CosIng database and the US FDA (as a generally recognized safe ingredient). No concentration restrictions are typically imposed.
- Common uses
- Moisturizers, Cleansers, Serums, Sunscreens
- Environmental note
- Derived from renewable plant sources (glycerin and stearic acid) and is readily biodegradable, posing low risk to aquatic ecosystems.
Good to know
- Polyglyceryl-10 Stearate is often used in 'free-from' formulations that avoid ethoxylated ingredients.
- It is compatible with a wide pH range (typically 4–8), making it versatile for different product types.
Common questions
What is Polyglyceryl-10 Stearate in beauty products?
Polyglyceryl-10 Stearate is a gentle emulsifier made from plant-derived glycerin and stearic acid (a fatty acid found in coconut or palm oil). Its job is to help water and oil mix together so your lotion or cream stays smooth and doesn't separate. Because it's very mild and non-irritating, it's a favorite in products for sensitive skin and in 'clean beauty' lines.
What does Polyglyceryl-10 Stearate do in a beauty product?
It has a water-loving head (polyglycerin) and an oil-loving tail (stearate). When mixed, it positions itself at the boundary between oil and water droplets, reducing surface tension so they blend into a stable, creamy emulsion. This prevents your product from separating into watery and oily layers.
Is Polyglyceryl-10 Stearate safe for most people?
Polyglyceryl-10 Stearate is considered very safe for cosmetic use. It has a low irritation and comedogenic rating, making it suitable for sensitive and acne-prone skin. No significant safety concerns have been reported in clinical or regulatory reviews.
Who should be careful with Polyglyceryl-10 Stearate?
Those with a known allergy to stearic acid or polyglycerin (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.