Ingredient review
Hydrogenated Polydodecene
INCI: Hydrogenated Polydodecene
A synthetic emollient that spreads easily, feels lightweight, and helps other ingredients absorb without clogging pores.
In plain English
Hydrogenated polydodecene is a man-made oil that feels very light and silky on the skin. Unlike heavy oils or butters, it doesn't leave a greasy film. It helps your moisturizer or foundation glide on smoothly and can make the product feel more elegant. Because it's non-comedogenic, it's often used in products for oily or acne-prone skin.
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
Hydrogenated Polydodecene 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 Hydrogenated Polydodecene.
- 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 hydrocarbon oil made by hydrogenating polydodecene, resulting in a clear, odorless, and very stable liquid that mimics the feel of natural oils without their drawbacks.
How it works
It sits on the skin's surface to fill in rough patches and reduce water loss (TEWL, or transepidermal water loss — the moisture that evaporates from your skin). Its low viscosity allows it to spread thinly, creating a smooth, velvety finish that also helps other active ingredients penetrate better.
Pros
Feels weightless
Unlike many oils, it spreads into a thin, silky layer that doesn't sit heavy on the skin, making it ideal for daytime use under makeup.
Won't clog pores
Rated very low on the comedogenic scale, so it's a safe choice for acne-prone or congested skin.
Cons and cautions
Not natural
It's a fully synthetic ingredient, which may be a turn-off for those seeking plant-based or naturally derived formulas.
Limited skin benefits beyond feel
It's primarily a texture enhancer and doesn't provide antioxidants, vitamins, or other active skin benefits.
Best for
- People with oily or combination skin who want lightweight hydration
- Anyone who dislikes heavy, greasy textures in skincare or makeup
Use caution if
- Those who strictly avoid synthetic ingredients
- Individuals with known sensitivity to hydrocarbon-based emollients (rare)
Usage tips
Safety summary
Considered safe for use in cosmetics at typical concentrations. It has a very low irritation and allergy potential, and is not known to be toxic or carcinogenic. The Cosmetic Ingredient Review (CIR) panel has reviewed similar hydrocarbon emollients and found them safe.
Research notes
Most evidence comes from formulation science and safety assessments rather than clinical efficacy studies. It is well-documented as a safe, non-irritating emollient with a long history of use in personal care products.
Common label clues
- Typical concentration
- 1% to 10%
- Regulatory status
- Approved for use in cosmetics globally, including by the U.S. FDA and EU CosIng database, with no known restrictions.
- Common uses
- Moisturizers, Serums, Sunscreens, Foundations, Lip products
- Environmental note
- As a synthetic hydrocarbon, it is not biodegradable and may persist in the environment, though it is not classified as a bioaccumulative toxin.
Good to know
- It's often used as a replacement for silicone oils like dimethicone in 'silicone-free' formulas.
- It's highly stable and resists oxidation, so products containing it have a long shelf life.
Common questions
What is Hydrogenated Polydodecene in beauty products?
Hydrogenated polydodecene is a man-made oil that feels very light and silky on the skin. Unlike heavy oils or butters, it doesn't leave a greasy film. It helps your moisturizer or foundation glide on smoothly and can make the product feel more elegant. Because it's non-comedogenic, it's often used in products for oily or acne-prone skin.
What does Hydrogenated Polydodecene do in a beauty product?
It sits on the skin's surface to fill in rough patches and reduce water loss (TEWL, or transepidermal water loss — the moisture that evaporates from your skin). Its low viscosity allows it to spread thinly, creating a smooth, velvety finish that also helps other active ingredients penetrate better.
Is Hydrogenated Polydodecene safe for most people?
Considered safe for use in cosmetics at typical concentrations. It has a very low irritation and allergy potential, and is not known to be toxic or carcinogenic. The Cosmetic Ingredient Review (CIR) panel has reviewed similar hydrocarbon emollients and found them safe.
Who should be careful with Hydrogenated Polydodecene?
Those who strictly avoid synthetic ingredients Individuals with known sensitivity to hydrocarbon-based emollients (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.