Ingredient review
C14-28 Isoalkyl Acid
INCI: C14-28 Isoalkyl Acid
A gentle synthetic fatty acid that helps soften skin and stabilize formulas without common irritation.
In plain English
C14-28 Isoalkyl Acid is a lab-made blend of fatty acids (the building blocks of oils) that acts as an emollient. It smooths and softens the skin by filling in tiny gaps between skin cells, and it also helps other ingredients mix together evenly in a product. Think of it as a gentle helper that makes creams feel richer and more stable.
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
C14-28 Isoalkyl 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 Isoalkyl 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 synthetic mixture of branched-chain fatty acids with carbon chain lengths ranging from 14 to 28 atoms. It is produced through chemical synthesis to mimic the skin-friendly properties of natural fatty acids.
How it works
As an emollient, it forms a thin, non-greasy film on the skin's surface that reduces water loss and improves texture. It also acts as a co-emulsifier, helping oil and water phases blend smoothly in creams and lotions.
Pros
Gentle on skin
Low irritation and comedogenic risk make it suitable for most skin types, including sensitive skin.
Improves product feel
Gives creams and lotions a smooth, non-greasy texture that spreads easily and absorbs quickly.
Cons and cautions
Synthetic origin
Not derived from natural sources, which may be a drawback for those seeking plant-based or organic formulations.
Limited research
Fewer studies exist on this specific synthetic blend compared to well-known natural fatty acids, so long-term effects are less documented.
Best for
- People with normal to dry skin looking for gentle emollience
- Those who prefer synthetic ingredients with consistent quality
Use caution if
- Individuals with known sensitivity to synthetic fatty acids (rare)
- Strict adherents to 100% natural skincare routines
Usage tips
Safety summary
C14-28 Isoalkyl Acid is considered safe for cosmetic use with low irritation and comedogenic potential. It is well-tolerated by most skin types, though patch testing is recommended for those with very sensitive skin.
Research notes
Evidence is based on general fatty acid safety data and industry experience. Specific studies on this exact blend are limited, but it is structurally similar to other safe synthetic emollients.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the EU, US, and many other regions. No specific restrictions at typical concentrations.
- Common uses
- Moisturizers, Cleansers, Barrier creams
- Environmental note
- As a synthetic compound, its biodegradability may vary. It is not known to be a significant environmental concern at cosmetic use levels.
Good to know
- This ingredient is often used in combination with other fatty acids to fine-tune product texture.
- It is considered safe by major cosmetic ingredient review panels at typical use levels.
Common questions
What is C14-28 Isoalkyl Acid in beauty products?
C14-28 Isoalkyl Acid is a lab-made blend of fatty acids (the building blocks of oils) that acts as an emollient. It smooths and softens the skin by filling in tiny gaps between skin cells, and it also helps other ingredients mix together evenly in a product. Think of it as a gentle helper that makes creams feel richer and more stable.
What does C14-28 Isoalkyl Acid do in a beauty product?
As an emollient, it forms a thin, non-greasy film on the skin's surface that reduces water loss and improves texture. It also acts as a co-emulsifier, helping oil and water phases blend smoothly in creams and lotions.
Is C14-28 Isoalkyl Acid safe for most people?
C14-28 Isoalkyl Acid is considered safe for cosmetic use with low irritation and comedogenic potential. It is well-tolerated by most skin types, though patch testing is recommended for those with very sensitive skin.
Who should be careful with C14-28 Isoalkyl Acid?
Individuals with known sensitivity to synthetic fatty acids (rare) Strict adherents to 100% natural skincare routines
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.