Ingredient review
Choleth-30
INCI: CHOLETH-30
Choleth-30 is a mild, cholesterol-based emulsifier that helps blend oil and water in skincare products while leaving a smooth, non-greasy feel.
In plain English
Choleth-30 is a helper ingredient that mixes oil and water together so your lotion or cream stays smooth and doesn't separate. It's made from cholesterol (a natural fat found in your skin) and is very gentle, so it's unlikely to cause irritation or clog pores. You'll find it in many moisturizers and serums where it also adds a silky, soft texture.
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-30 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-30.
- 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-30 is a semi-synthetic ingredient created by attaching 30 units of ethylene oxide to cholesterol. This process makes the cholesterol water-friendly while keeping its oil-loving properties, allowing it to act as an emulsifier that stabilizes oil-and-water mixtures in cosmetics.
How it works
In a skincare product, Choleth-30 sits at the boundary between oil and water droplets, reducing surface tension so they blend into a stable emulsion. This prevents the product from separating into layers. It also deposits a thin, cholesterol-like film on the skin, which can help reinforce the skin's natural barrier and improve the feel of the formula.
Pros
Gentle on skin
Choleth-30 has a very low irritation and comedogenic risk, making it a safe choice for sensitive or acne-prone skin types.
Improves product texture
It helps create a smooth, silky feel in creams and serums without leaving a heavy or greasy residue, enhancing the user experience.
Cons and cautions
Not vegan-friendly
Because it is derived from cholesterol (often sourced from lanolin from sheep's wool), it may not fit into a strict vegan or plant-based skincare routine.
Limited skin benefit evidence
While it may support the skin barrier due to its cholesterol base, most research focuses on its role as an emulsifier rather than direct skin benefits.
Best for
- Anyone looking for a gentle, non-irritating emulsifier in their moisturizer or serum
- People with dry or sensitive skin who want a product that feels smooth and non-greasy
Use caution if
- Those who strictly avoid animal-derived ingredients (cholesterol may come from lanolin)
Usage tips
Safety summary
Choleth-30 is considered safe for use in cosmetics. It has a low potential for skin irritation and clogging pores. However, individuals with wool allergies may want to check the source of the cholesterol, as it is often derived from lanolin.
Research notes
Research on Choleth-30 primarily supports its function as a safe and effective emulsifier. Studies on cholesterol derivatives suggest they can support skin barrier function, but direct evidence for Choleth-30 is limited. It is generally recognized as safe by cosmetic ingredient review panels.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the EU, US, and many other regions. It is not a restricted ingredient and is considered safe at typical use levels.
- Common uses
- Moisturizers, Serums, Cleansers, Sunscreens
- Environmental note
- Choleth-30 is semi-synthetic and may not be readily biodegradable, but its environmental impact is considered low due to low usage concentrations.
Good to know
- Choleth-30 is often used alongside other emulsifiers to create a stable formula, so it's rarely the only emulsifier in a product.
- The '30' in its name refers to the number of ethylene oxide units, which affects how water-friendly it is.
Common questions
What is Choleth-30 in beauty products?
Choleth-30 is a helper ingredient that mixes oil and water together so your lotion or cream stays smooth and doesn't separate. It's made from cholesterol (a natural fat found in your skin) and is very gentle, so it's unlikely to cause irritation or clog pores. You'll find it in many moisturizers and serums where it also adds a silky, soft texture.
What does Choleth-30 do in a beauty product?
In a skincare product, Choleth-30 sits at the boundary between oil and water droplets, reducing surface tension so they blend into a stable emulsion. This prevents the product from separating into layers. It also deposits a thin, cholesterol-like film on the skin, which can help reinforce the skin's natural barrier and improve the feel of the formula.
Is Choleth-30 safe for most people?
Choleth-30 is considered safe for use in cosmetics. It has a low potential for skin irritation and clogging pores. However, individuals with wool allergies may want to check the source of the cholesterol, as it is often derived from lanolin.
Who should be careful with Choleth-30?
Those who strictly avoid animal-derived ingredients (cholesterol may come from lanolin)
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.