Ingredient review
C24-28 Olefin
INCI: C24-28 OLEFIN
A synthetic emollient that helps products glide on smoothly without feeling greasy, generally well-tolerated by most skin types.
In plain English
C24-28 Olefin is a synthetic ingredient made from long-chain hydrocarbons. It acts as an emollient, meaning it softens and smooths the skin by forming a light, non-greasy film. This helps other ingredients spread evenly and gives products a silky feel. It also helps control the thickness of a formula, so creams and lotions have the right consistency. Because it's synthetic, it's very stable and doesn't spoil easily, making it a reliable choice for many 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
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
C24-28 Olefin 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 C24-28 Olefin.
- 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 synthetic alpha olefin derived from petroleum, consisting of a mixture of long-chain hydrocarbons with 24 to 28 carbon atoms. It is produced through the oligomerization of ethylene and is used primarily as an emollient and viscosity modifier in cosmetics.
How it works
C24-28 Olefin works by depositing a thin, non-occlusive film on the skin's surface. This film reduces water loss (transepidermal water loss, or TEWL) by a small amount, helping to keep skin hydrated. It also improves the spreadability of a product, making it easier to apply evenly. In formulas, it helps adjust the thickness or 'body' of a cream or lotion, ensuring a pleasant texture.
Pros
Silky, non-greasy feel
Creates a smooth, velvety texture on skin without leaving a heavy or oily residue, making it pleasant for daily use.
Low irritation potential
Rarely causes allergic reactions or breakouts, making it suitable for sensitive skin types when used in typical concentrations.
Cons and cautions
Petroleum-derived
Sourced from non-renewable petroleum, which may not align with eco-conscious or natural skincare preferences.
Limited active benefits
Primarily a texture enhancer; it does not provide significant hydration, antioxidants, or other active skincare benefits on its own.
Best for
- People with normal to dry skin looking for a light, non-greasy moisturizer
- Those who prefer stable, long-lasting formulas without natural oil rancidity
Use caution if
- Individuals seeking exclusively natural or plant-based ingredients
- Those with very oily or acne-prone skin who may prefer lighter, water-based textures
Usage tips
Safety summary
C24-28 Olefin is considered safe for use in cosmetics at typical concentrations. It has a low irritation and comedogenic rating, meaning it is unlikely to cause breakouts or skin reactions. However, as a synthetic ingredient, some consumers may prefer natural alternatives.
Research notes
Safety assessments by the Cosmetic Ingredient Review (CIR) panel have concluded that alpha olefins like C24-28 Olefin are safe for use in cosmetics. Research primarily focuses on their role as emollients and viscosity modifiers, with no significant concerns for human health at exposure levels found in personal care products.
Common label clues
- Typical concentration
- Typically 1–10% in leave-on products, lower in rinse-off formulas
- Regulatory status
- Approved for use in cosmetics in the U.S. (FDA) and EU (CosIng database) with no known restrictions at typical concentrations.
- Common uses
- Moisturizers, Lipsticks, Foundations, Hair conditioners, Sunscreens
- Environmental note
- As a petroleum-derived ingredient, its production has a higher carbon footprint compared to plant-based alternatives. It is not biodegradable in the environment.
Good to know
- C24-28 Olefin is considered safe by major regulatory bodies including the U.S. FDA and the European Commission for use in cosmetics.
- It is often used in combination with other emollients to achieve a specific texture, so it rarely appears as the sole oil in a formula.
Common questions
What is C24-28 Olefin in beauty products?
C24-28 Olefin is a synthetic ingredient made from long-chain hydrocarbons. It acts as an emollient, meaning it softens and smooths the skin by forming a light, non-greasy film. This helps other ingredients spread evenly and gives products a silky feel. It also helps control the thickness of a formula, so creams and lotions have the right consistency. Because it's synthetic, it's very stable and doesn't spoil easily, making it a reliable choice for many cosmetics.
What does C24-28 Olefin do in a beauty product?
C24-28 Olefin works by depositing a thin, non-occlusive film on the skin's surface. This film reduces water loss (transepidermal water loss, or TEWL) by a small amount, helping to keep skin hydrated. It also improves the spreadability of a product, making it easier to apply evenly. In formulas, it helps adjust the thickness or 'body' of a cream or lotion, ensuring a pleasant texture.
Is C24-28 Olefin safe for most people?
C24-28 Olefin is considered safe for use in cosmetics at typical concentrations. It has a low irritation and comedogenic rating, meaning it is unlikely to cause breakouts or skin reactions. However, as a synthetic ingredient, some consumers may prefer natural alternatives.
Who should be careful with C24-28 Olefin?
Individuals seeking exclusively natural or plant-based ingredients Those with very oily or acne-prone skin who may prefer lighter, water-based textures
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.