Ingredient review
Choleth-5
INCI: CHOLETH-5
Choleth-5 is a mild emulsifier that helps oil and water mix in your skincare products, with a low risk of irritation.
In plain English
Choleth-5 is a helper ingredient that keeps the oil and water parts of a cream or lotion from separating. It's made by adding a small chain of ethylene oxide to cholesterol, which makes it water-friendly while keeping its skin-like feel. Because it's based on cholesterol, a natural part of your skin barrier, it's generally very gentle and unlikely to cause breakouts or irritation.
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
Choleth-5 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 Choleth-5.
- 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
Choleth-5 is a semi-synthetic emulsifier created by reacting cholesterol with 5 units of ethylene oxide. It belongs to the 'choleth' family of ingredients, which are known for being mild and compatible with skin.
How it works
In a cosmetic formula, Choleth-5 sits at the boundary between oil and water droplets, reducing surface tension so they blend into a stable, smooth cream or lotion. It also helps other ingredients spread evenly on your skin and can leave a soft, non-greasy after-feel.
Pros
Gentle on skin
Choleth-5 is derived from cholesterol, a natural part of your skin barrier, so it's unlikely to cause stinging, redness, or breakouts.
Improves product texture
It helps creams and lotions feel smooth and silky without a heavy, greasy residue, making your skincare routine more pleasant.
Cons and cautions
Not for all formula types
Choleth-5 works best in traditional creams and lotions; it may not be ideal for very lightweight gels or sprayable products.
Ethoxylation concerns
As an ethoxylated ingredient, some consumers prefer to avoid it due to potential trace impurities, though Choleth-5 is considered safe at cosmetic levels.
Best for
- Anyone looking for a gentle, non-irritating moisturizer or cream
- People with sensitive or reactive skin who want stable formulas
Use caution if
- Those who strictly avoid any ethoxylated ingredients (though Choleth-5 is considered very low risk)
Usage tips
Safety summary
Choleth-5 is considered very safe for topical use. It has low irritation and comedogenic potential, and is well-tolerated even by sensitive skin. As with any ethoxylated ingredient, trace levels of 1,4-dioxane are possible but are typically below safety limits in well-manufactured products.
Research notes
The Cosmetic Ingredient Review (CIR) panel has evaluated choleth ingredients and concluded they are safe for use in cosmetics. Studies show low skin irritation and sensitization potential. No significant safety concerns have been identified at typical use levels.
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 choleth ingredients and found them safe as used.
- Common uses
- Moisturizers, Cleansers, Serums, Sunscreens
- Environmental note
- Choleth-5 is semi-synthetic; its production involves ethylene oxide, which has environmental considerations. However, it is used in very small amounts per product.
Good to know
- Choleth-5 is often used in 'skin-identical' formulas because cholesterol is a key component of your skin's natural barrier.
- It's considered a non-ionic emulsifier, which means it works well across a wide pH range.
Common questions
What is Choleth-5 in beauty products?
Choleth-5 is a helper ingredient that keeps the oil and water parts of a cream or lotion from separating. It's made by adding a small chain of ethylene oxide to cholesterol, which makes it water-friendly while keeping its skin-like feel. Because it's based on cholesterol, a natural part of your skin barrier, it's generally very gentle and unlikely to cause breakouts or irritation.
What does Choleth-5 do in a beauty product?
In a cosmetic formula, Choleth-5 sits at the boundary between oil and water droplets, reducing surface tension so they blend into a stable, smooth cream or lotion. It also helps other ingredients spread evenly on your skin and can leave a soft, non-greasy after-feel.
Is Choleth-5 safe for most people?
Choleth-5 is considered very safe for topical use. It has low irritation and comedogenic potential, and is well-tolerated even by sensitive skin. As with any ethoxylated ingredient, trace levels of 1,4-dioxane are possible but are typically below safety limits in well-manufactured products.
Who should be careful with Choleth-5?
Those who strictly avoid any ethoxylated ingredients (though Choleth-5 is considered very low risk)
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.