Ingredient review
C14-28 Alkyl Acid
INCI: C14-28 Alkyl Acid
A gentle fatty acid blend that helps cleanse without stripping the skin.
In plain English
C14-28 Alkyl Acid is a mixture of fatty acids from natural sources like coconut or palm oil. In skincare, it acts as a mild cleansing agent that helps remove dirt and oil without being harsh. It also helps stabilize formulas by helping oil and water mix together.
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
- natural
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
C14-28 Alkyl Acid 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 C14-28 Alkyl Acid.
- 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 blend of long-chain fatty acids (carbon chains 14 to 28 atoms long) derived from plant oils, used primarily as a cleansing and emulsifying ingredient.
How it works
These fatty acids work by binding to both oil and water, allowing them to mix and rinse away impurities. In bar soaps and cleansers, they help create a gentle lather and leave skin feeling clean but not overly dry.
Pros
Gentle on skin
Unlike sulfates, this fatty acid blend cleanses without disrupting the skin barrier, making it ideal for dry or sensitive skin types.
Good for bar soaps
It helps create a firm, long-lasting bar with a creamy lather that rinses cleanly.
Cons and cautions
Limited lather
Compared to synthetic surfactants, it produces a less foamy lather, which some users may not prefer.
Sustainability concerns
Often derived from palm oil, which can be linked to deforestation unless certified sustainable.
Best for
- People with dry or sensitive skin
- Those looking for a mild, non-stripping cleanser
Use caution if
- Those with very oily skin may prefer stronger cleansers
- Anyone avoiding palm-derived ingredients
Usage tips
Safety summary
C14-28 Alkyl Acid is considered safe for cosmetic use with low irritation and comedogenic risk. It is not associated with significant health concerns.
Research notes
Fatty acids like those in this blend are well-studied as mild cleansers. They are generally recognized as safe by cosmetic ingredient review panels.
Common label clues
- Typical concentration
- 1-10% in rinse-off products
- Regulatory status
- Approved for use in cosmetics by the FDA and EU CosIng database as a safe cleansing agent.
- Common uses
- Cleansers, Soaps, Bar cleansers
- Environmental note
- Sourcing from palm oil may have environmental impact; look for RSPO-certified or coconut-derived alternatives.
Good to know
- This ingredient is often listed alongside other fatty acids in soap-making
- It is generally considered safe for all skin types
Common questions
What is C14-28 Alkyl Acid in beauty products?
C14-28 Alkyl Acid is a mixture of fatty acids from natural sources like coconut or palm oil. In skincare, it acts as a mild cleansing agent that helps remove dirt and oil without being harsh. It also helps stabilize formulas by helping oil and water mix together.
What does C14-28 Alkyl Acid do in a beauty product?
These fatty acids work by binding to both oil and water, allowing them to mix and rinse away impurities. In bar soaps and cleansers, they help create a gentle lather and leave skin feeling clean but not overly dry.
Is C14-28 Alkyl Acid safe for most people?
C14-28 Alkyl Acid is considered safe for cosmetic use with low irritation and comedogenic risk. It is not associated with significant health concerns.
Who should be careful with C14-28 Alkyl Acid?
Those with very oily skin may prefer stronger cleansers Anyone avoiding palm-derived ingredients
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.