Ingredient review
Undecylenoyl Collagen Amino Acids
INCI: UNDECYLENOYL COLLAGEN AMINO ACIDS
A mild, amino-acid-based surfactant that cleanses without stripping the skin, making it a great choice for sensitive or dry skin types.
In plain English
Undecylenoyl Collagen Amino Acids is a gentle cleansing ingredient made by combining collagen amino acids (the building blocks of protein) with undecylenic acid, a fatty acid from castor oil. It works like a mild soap but is much kinder to your skin, helping to remove dirt and oil without leaving your face feeling tight or dry. You'll often find it in creamy or foaming cleansers labeled as 'amino acid cleansers.'
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
Undecylenoyl Collagen Amino Acids 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 Undecylenoyl Collagen Amino Acids.
- 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 semi-synthetic lipoamino acid surfactant created by bonding undecylenic acid (from castor oil) with collagen-derived amino acids. It is a mild, anionic surfactant that produces a rich, creamy foam.
How it works
It reduces the surface tension between water and oil, allowing dirt and excess sebum to be rinsed away. Unlike harsher sulfates, its large molecular structure is less able to penetrate the skin barrier, so it cleanses gently without over-stripping natural oils.
Pros
Ultra-gentle cleansing
This ingredient cleanses effectively without stripping your skin's natural moisture barrier, making it ideal for daily use on sensitive or dry skin.
Conditioning feel
Unlike many harsh cleansers, it leaves skin feeling soft and smooth after rinsing, not tight or irritated.
Cons and cautions
Lower foam volume
It produces a creamy, low-to-moderate foam rather than big, bubbly lather. If you love a rich foam, you might find it less satisfying.
Higher cost
Amino-acid-based surfactants are more expensive to produce, so products containing them often cost more than conventional cleansers.
Best for
- People with dry or sensitive skin looking for a mild cleanser
- Anyone wanting to avoid harsh sulfates like SLS or SLES
Use caution if
- Those who prefer a very high-foam, bubbly cleanser experience
Usage tips
Safety summary
Undecylenoyl Collagen Amino Acids is considered very safe for topical use. It has a low irritation and comedogenic rating, making it suitable for sensitive and acne-prone skin. No significant safety concerns have been reported in cosmetic concentrations.
Research notes
Amino-acid-based surfactants like this one are well-studied for their mildness and skin compatibility. Research indicates they cause less barrier disruption and protein denaturation compared to traditional anionic surfactants such as sodium lauryl sulfate.
Common label clues
- Typical concentration
- 0.5% to 5% in rinse-off products
- Regulatory status
- Approved for use in cosmetics in the EU, US, and other major markets. Generally recognized as safe when used as directed in rinse-off products.
- Common uses
- Cleansers, Shampoos, Body washes, Facial cleansers
- Environmental note
- Derived from castor oil and collagen amino acids, it is biodegradable and has a lower environmental impact compared to many petroleum-based surfactants.
Good to know
- Often listed as 'Undecylenoyl Collagen Amino Acids' on ingredient labels, it is a key component in many 'amino acid cleansers' popular in K-beauty.
- It is biodegradable and considered environmentally friendlier than some traditional surfactants.
Common questions
What is Undecylenoyl Collagen Amino Acids in beauty products?
Undecylenoyl Collagen Amino Acids is a gentle cleansing ingredient made by combining collagen amino acids (the building blocks of protein) with undecylenic acid, a fatty acid from castor oil. It works like a mild soap but is much kinder to your skin, helping to remove dirt and oil without leaving your face feeling tight or dry. You'll often find it in creamy or foaming cleansers labeled as 'amino acid cleansers.'
What does Undecylenoyl Collagen Amino Acids do in a beauty product?
It reduces the surface tension between water and oil, allowing dirt and excess sebum to be rinsed away. Unlike harsher sulfates, its large molecular structure is less able to penetrate the skin barrier, so it cleanses gently without over-stripping natural oils.
Is Undecylenoyl Collagen Amino Acids safe for most people?
Undecylenoyl Collagen Amino Acids is considered very safe for topical use. It has a low irritation and comedogenic rating, making it suitable for sensitive and acne-prone skin. No significant safety concerns have been reported in cosmetic concentrations.
Who should be careful with Undecylenoyl Collagen Amino Acids?
Those who prefer a very high-foam, bubbly cleanser experience
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.