Ingredient review
PEG-200 Glyceryl Stearate
INCI: PEG-200 Glyceryl Stearate
A reliable emulsifier that helps blend oil and water in creams and lotions, but its PEG component raises mild purity concerns for some users.
In plain English
PEG-200 Glyceryl Stearate is a helper ingredient that keeps oil and water mixed together in products like lotions and creams. The 'PEG' part means it's made with polyethylene glycol, a synthetic compound that can sometimes contain tiny impurities called 1,4-dioxane if not properly purified. However, reputable manufacturers purify it well, so it's generally considered safe in the small amounts used in cosmetics.
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
PEG-200 Glyceryl 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 PEG-200 Glyceryl 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 semi-synthetic emulsifier created by reacting glyceryl stearate (a natural fat derivative) with 200 units of ethylene oxide (PEG). It belongs to the PEG stearate family and is valued for its ability to stabilize emulsions and create a smooth, creamy texture.
How it works
Its long PEG chain makes it water-loving (hydrophilic) while the stearate part is oil-loving (lipophilic). When added to a formula, it positions itself at the boundary between oil and water droplets, reducing surface tension and preventing them from separating. This gives the product a uniform, stable consistency.
Pros
Excellent emulsifier
It reliably blends oil and water, preventing separation and giving creams a smooth, uniform texture that feels pleasant on the skin.
Low irritation potential
At typical use levels, it is very gentle and unlikely to cause stinging or redness, making it suitable for most skin types, including sensitive skin.
Cons and cautions
Purity concerns with PEGs
During manufacturing, PEG compounds can be contaminated with 1,4-dioxane, a potential carcinogen. However, reputable brands use purification steps to keep levels well below safety limits.
Not eco-friendly
PEG-200 Glyceryl Stearate is not readily biodegradable and may contribute to environmental persistence, which is a concern for eco-conscious consumers.
Best for
- Anyone using standard moisturizers or cleansers (it's very common)
- People who prefer products with a rich, creamy feel
Use caution if
- Those specifically avoiding all PEG-derived ingredients due to purity or environmental concerns
Usage tips
Safety summary
Generally recognized as safe for cosmetic use at typical concentrations. The main concern is potential contamination with 1,4-dioxane, but this is well-controlled by quality manufacturers. Irritation and allergy are rare.
Research notes
Studies on PEG stearates show low acute toxicity and skin irritation. The Cosmetic Ingredient Review (CIR) panel has reviewed PEG stearates and found them safe as used in cosmetics, with the caveat that impurities should be minimized.
Common label clues
- Typical concentration
- 1–5% in leave-on products; up to 10% in rinse-off products
- Regulatory status
- Approved for use in cosmetics by the FDA and the European Commission, with no concentration restrictions. Manufacturers are expected to follow good manufacturing practices to minimize 1,4-dioxane contamination.
- Common uses
- Moisturizers, Cleansers, Sunscreens, Hair conditioners
- Environmental note
- PEG-200 Glyceryl Stearate is not readily biodegradable and may accumulate in aquatic environments. Some consumers prefer plant-based or biodegradable alternatives.
Good to know
- The number '200' refers to the length of the PEG chain, which affects its water solubility and thickening ability.
- It is often used alongside other emulsifiers to fine-tune product feel and stability.
Common questions
What is PEG-200 Glyceryl Stearate in beauty products?
PEG-200 Glyceryl Stearate is a helper ingredient that keeps oil and water mixed together in products like lotions and creams. The 'PEG' part means it's made with polyethylene glycol, a synthetic compound that can sometimes contain tiny impurities called 1,4-dioxane if not properly purified. However, reputable manufacturers purify it well, so it's generally considered safe in the small amounts used in cosmetics.
What does PEG-200 Glyceryl Stearate do in a beauty product?
Its long PEG chain makes it water-loving (hydrophilic) while the stearate part is oil-loving (lipophilic). When added to a formula, it positions itself at the boundary between oil and water droplets, reducing surface tension and preventing them from separating. This gives the product a uniform, stable consistency.
Is PEG-200 Glyceryl Stearate safe for most people?
Generally recognized as safe for cosmetic use at typical concentrations. The main concern is potential contamination with 1,4-dioxane, but this is well-controlled by quality manufacturers. Irritation and allergy are rare.
Who should be careful with PEG-200 Glyceryl Stearate?
Those specifically avoiding all PEG-derived ingredients due to purity or environmental concerns
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.