Ingredient review
Polyglyceryl-10 Pentahydroxystearate
INCI: Polyglyceryl-10 Pentahydroxystearate
A mild, non-irritating emulsifier that creates stable, silky creams and lotions without stripping the skin.
In plain English
This ingredient is a gentle helper that mixes oil and water together so your moisturizer or cleanser has a smooth, creamy texture. It is made from glycerin (a natural humectant) and stearic acid (a fatty acid from plants). Unlike some harsh emulsifiers, it is very unlikely to cause irritation or clog pores, making it a favorite for sensitive and acne-prone skin.
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 Pentahydroxystearate 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 Pentahydroxystearate.
- 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
Polyglyceryl-10 Pentahydroxystearate is a semi-synthetic emulsifier derived from glycerin and stearic acid. It belongs to the polyglyceryl ester family, known for being mild and biodegradable.
How it works
It works by reducing the surface tension between oil and water, allowing them to mix into a stable emulsion. This creates a uniform, spreadable cream or lotion that feels light and non-greasy on the skin.
Pros
Ultra-gentle on skin
Unlike some emulsifiers that can cause stinging or redness, this ingredient is very mild and well-tolerated even by eczema-prone skin.
Non-comedogenic
It has a low comedogenic rating, meaning it is unlikely to clog pores, making it safe for acne-prone and oily skin types.
Cons and cautions
Limited thickening ability
It primarily stabilizes emulsions but does not add much thickness, so formulas may need additional thickeners for a rich, creamy texture.
Sensitive to formula pH
Its performance can drop in very acidic or high-salt formulas, which may limit its use in certain products like exfoliating serums.
Best for
- People with sensitive or reactive skin
- Those looking for non-comedogenic moisturizers and cleansers
Use caution if
- Individuals with known allergies to polyglycerin derivatives (rare)
Usage tips
Safety summary
Polyglyceryl-10 Pentahydroxystearate is considered very safe for cosmetic use. It has low irritation and sensitization potential, and no known toxicity concerns at typical use levels.
Research notes
Research on polyglyceryl esters indicates they are mild, non-irritating, and effective emulsifiers. Specific studies on this variant are limited, but the broader class is well-documented for safety and performance.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics worldwide, including by the EU CosIng database and the US FDA (as part of generally recognized safe ingredients).
- Common uses
- Moisturizers, Cleansers, Serums, Sunscreens
- Environmental note
- Biodegradable and derived from renewable plant sources, making it a more eco-friendly choice compared to some petroleum-based emulsifiers.
Good to know
- Often found in 'clean beauty' products because it is biodegradable and derived from plant sources.
- It is a PEG-free alternative to many synthetic emulsifiers.
Common questions
What is Polyglyceryl-10 Pentahydroxystearate in beauty products?
This ingredient is a gentle helper that mixes oil and water together so your moisturizer or cleanser has a smooth, creamy texture. It is made from glycerin (a natural humectant) and stearic acid (a fatty acid from plants). Unlike some harsh emulsifiers, it is very unlikely to cause irritation or clog pores, making it a favorite for sensitive and acne-prone skin.
What does Polyglyceryl-10 Pentahydroxystearate do in a beauty product?
It works by reducing the surface tension between oil and water, allowing them to mix into a stable emulsion. This creates a uniform, spreadable cream or lotion that feels light and non-greasy on the skin.
Is Polyglyceryl-10 Pentahydroxystearate safe for most people?
Polyglyceryl-10 Pentahydroxystearate is considered very safe for cosmetic use. It has low irritation and sensitization potential, and no known toxicity concerns at typical use levels.
Who should be careful with Polyglyceryl-10 Pentahydroxystearate?
Individuals with known allergies to polyglycerin 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.